{"id":211632,"date":"2022-06-01T17:26:22","date_gmt":"2022-06-01T11:56:22","guid":{"rendered":"https:\/\/cracku.in\/blog\/?p=211632"},"modified":"2022-06-01T17:26:22","modified_gmt":"2022-06-01T11:56:22","slug":"cat-linear-equations-questions-with-notes-pdf","status":"publish","type":"post","link":"https:\/\/cracku.in\/blog\/cat-linear-equations-questions-with-notes-pdf\/","title":{"rendered":"CAT Linear Equations Questions (with Notes) PDF"},"content":{"rendered":"<p><span data-preserver-spaces=\"true\"><strong>Linear Equations <\/strong>is one of the key topics in the <strong>CAT Quants Section<\/strong>. CAT Linear Equations questions appear in the CAT and other MBA entrance exams every year. You can check out these<\/span><a href=\"https:\/\/cracku.in\/cat-previous-papers\" target=\"_blank\" rel=\"noopener noreferrer\"><strong> CAT Linear Equations Questions from Previous years.<\/strong><\/a> In this article, we will look into some important CAT Linear Equations Questions (<strong>with Notes<\/strong>) PDF. These are a good source for practice; If you want to practice these questions, you can download the CAT Linear Equations Questions PDF below, which is completely Free.<\/p>\n<p class=\"text-center\"><a href=\"https:\/\/cracku.in\/downloads\/15407\" target=\"_blank\" class=\"btn btn-danger  download\">Download Important Linear Equations Questions for CAT<\/a><\/p>\n<p class=\"text-center\"><a href=\"https:\/\/cracku.in\/cat-2022-online-coaching\" target=\"_blank\" class=\"btn btn-info \">Enroll for CAT 2022 Online Course<\/a><\/p>\n<ul>\n<li><strong>CAT Linear Equations Questions &#8211; Tip 1: <\/strong>Be thorough with all the basics of this topic. <span data-preserver-spaces=\"true\">Understand the important formulas well, especially equations with two variables. <\/span>If you&#8217;re starting the prep, firstly understand the <a href=\"https:\/\/cracku.in\/cat-syllabus-pdf\" target=\"_blank\" rel=\"noopener noreferrer\">CAT Algebra Syllabus<\/a>; CAT linear equations questions are not very tough, and hence must not be avoided.<\/li>\n<li><strong>CAT Linear Equations Questions &#8211; Tip 2:<\/strong> Based on our analysis of the <a href=\"https:\/\/cracku.in\/cat-previous-papers\" target=\"_blank\" rel=\"noopener noreferrer\">previous year&#8217;s CAT questions<\/a>,\u00a0 this was the CAT <strong>Linear Equations weightage<\/strong>: 1-2 questions were asked on this topic (in CAT 2021).<\/li>\n<li>Practice these CAT linear equations questions PDF. Learn all the major formulae from these concepts. You can check out the <a href=\"https:\/\/cracku.in\/blog\/cat-formulas-pdf\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Important CAT linear equations questions &amp; Formulas PDF here<\/strong><\/a>.<\/li>\n<\/ul>\n<p><b>Question 1:\u00a0<\/b>Suppose you have a currency, named Miso, in three denominations: 1 Miso, 10 Misos and 50 Misos. In how many ways can you pay a bill of 107 Misos?<\/p>\n<p>a)\u00a017<\/p>\n<p>b)\u00a016<\/p>\n<p>c)\u00a018<\/p>\n<p>d)\u00a015<\/p>\n<p>e)\u00a019<\/p>\n<p><strong>1)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/18-suppose-you-have-a-currency-named-miso-in-three-de-x-cat-2007?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>If two 50 Misos are used, the 107 can be paid in only 1 way.<\/p>\n<p>If one 50 Miso is used, the number of ways of paying 107 is 6 &#8211; zero 10 Miso, one 10 Miso and so on till five 10 Misos.<\/p>\n<p>If no 50 Miso is used, the number of ways of paying 107 is 11 &#8211; zero 10 Miso, one 10 Miso and so on till ten 10 Misos.<\/p>\n<p>So, the total number of ways is 18<\/p>\n<p><b>Question 2:\u00a0<\/b>The price of Darjeeling tea (in rupees per kilogram) is 100 + 0.10n, on the nth day of 2007 (n=1, 2, &#8230;, 100), and then remains constant. On the other hand, the price of Ooty tea (in rupees per kilogram) is 89 + 0.15n, on the nth day of 2007 (n = 1, 2, &#8230;, 365). On which date in 2007 will the prices of these two varieties of tea be equal?<\/p>\n<p>a)\u00a0May 21<\/p>\n<p>b)\u00a0April 11<\/p>\n<p>c)\u00a0May 20<\/p>\n<p>d)\u00a0April 10<\/p>\n<p>e)\u00a0June 30<\/p>\n<p><strong>2)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/23-the-price-of-darjeeling-tea-in-rupees-per-kilogram-x-cat-2007?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Price of Darjeeling tea on 100th day= 100+(0.1*100)=110<br \/>\nPrice of Ooty tea on nth day= 89+0.15n<br \/>\nLet us assume that the price of both varieties of tea would become equal on nth day where n&lt;=100<br \/>\nSo<br \/>\n89+0.15n=100+0.1n<br \/>\nn=220 which does not satisfy the condition of n&lt;=100<br \/>\nSo the price of two varieties would become equal after 100th day.<br \/>\n89+0.15n=110<br \/>\nn=140<br \/>\n140th day of 2007 is May 20 (Jan=31,Feb=28,March=31,April=30,May=20)<\/p>\n<p><b>Question 3:\u00a0<\/b>When you reverse the digits of the number 13, the number increases by 18. How many other two-digit numbers increase by 18 when their digits are reversed?<\/p>\n<p>a)\u00a05<\/p>\n<p>b)\u00a06<\/p>\n<p>c)\u00a07<\/p>\n<p>d)\u00a08<\/p>\n<p>e)\u00a010<\/p>\n<p><strong>3)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/20-when-you-reverse-the-digits-of-the-number-13-the-n-x-cat-2006?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the number be xy<br \/>\n10y + x = 10x + y + 18<br \/>\n=&gt; 9y &#8211; 9x = 18<br \/>\n=&gt; y &#8211; x = 2<br \/>\nSo, y can take values from 9 to 4 (since 3 is already counted in 13)<br \/>\nNumber of possible values = 6<\/p>\n<p><b>Question 4:\u00a0<\/b>Three friends, returning from a movie, stopped to eat at a restaurant. After dinner, they paid their bill and noticed a bowl of mints at the front counter. Sita took one-third of the mints, but returned four because she had a momentary pang of guilt. Fatima then took one-fourth of what was left but returned three for similar reason. Eswari then took half of the remainder but threw two back into the bowl. The bowl had only 17 mints left when the raid was over. How many mints were originally in the bowl?<\/p>\n<p>a)\u00a038<\/p>\n<p>b)\u00a031<\/p>\n<p>c)\u00a041<\/p>\n<p>d)\u00a0None of these<\/p>\n<p><strong>4)\u00a0Answer\u00a0(D)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/21-three-friends-returning-from-a-movie-stopped-to-ea-x-cat-2001?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the total number of mints in the bowl be n<br \/>\nSita took n\/3 &#8211; 4. Remaining = 2n\/3 + 4<br \/>\nFatim took 1\/4(2n\/3 + 4) &#8211; 3. Remaining = 3\/4(2n\/3 + 4) + 3<br \/>\nEswari took 1\/2(3\/4(2n\/3+4)+3) &#8211; 2<br \/>\nRemaining = 1\/2(3\/4(2n\/3+4)+3) + 2 = 17<br \/>\n=&gt;\u00a03\/4(2n\/3+4)+3 = 30 =&gt;\u00a0(2n\/3+4) = 36 =&gt; n = 48<br \/>\nSo, the answer is option d)<\/p>\n<p><b>Question 5:\u00a0<\/b>At a certain fast food restaurant, Brian can buy 3 burgers, 7 shakes, and one order of fries for Rs. 120 exactly. At the same place it would cost Rs. 164.5 for 4 burgers, 10 shakes, and one order of fries. How much would it cost for an ordinary meal of one burger, one shake, and one order of fries?<\/p>\n<p>a)\u00a0Rs. 31<\/p>\n<p>b)\u00a0Rs. 41<\/p>\n<p>c)\u00a0Rs. 21<\/p>\n<p>d)\u00a0Cannot be determined<\/p>\n<p><strong>5)\u00a0Answer\u00a0(A)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/30-at-a-certain-fast-food-restaurant-brian-can-buy-3--x-cat-2001?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the price of 1 burger be x and the price of 1 shake be y and the prize of 1 french fries be z<br \/>\n3x + 7y + z = 120<br \/>\n4x + 10y + z = 164.5<br \/>\n=&gt; x + 3y = 44.5<br \/>\n=&gt; x = 44.5 &#8211; 3y<br \/>\n=&gt; 3(44.5 &#8211; 3y) + 7y + z = 120 =&gt; z = 120 &#8211; 133.5 + 2y<br \/>\nSo, x+y+z = 44.5 &#8211; 3y + y -13.5 + 2y = 31<br \/>\nSo, the cost of a meal consisting of 1 burger, 1 shake and 1 french fries = Rs 31<\/p>\n<p><b>Question 6:\u00a0<\/b>The number of solutions $(x, y, z)$ to the equation $x &#8211; y &#8211; z = 25$, where x, y, and z are positive integers such that $x\\leq40,y\\leq12$, and $z\\leq12$ is<\/p>\n<p>a)\u00a0101<\/p>\n<p>b)\u00a099<\/p>\n<p>c)\u00a087<\/p>\n<p>d)\u00a0105<\/p>\n<p><strong>6)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/91-the-number-of-solutions-x-y-z-to-the-equation-x-y--x-cat-2017-shift-1?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>x &#8211; y &#8211; z = 25 and\u00a0$x\\leq40,y\\leq12$,\u00a0$z\\leq12$<br \/>\nIf x = 40 then y + z = 15. Now since both y and z are natural numbers less than 12, so y can range from 3 to 12 giving us a total of 10 solutions.Similarly, if x = 39, then y +\u00a0z = 14. Now y can range from 2 to 12 giving us a total of 11 solutions.<br \/>\nIf x = 38, then y +\u00a0z = 13. Now y can range from 1 to 12 giving us a total of 12 solutions.<br \/>\nIf x = 37 then y + z = 12 which will give 11 solutions.<br \/>\nSimilarly on proceeding in the same manner the number of solutions will be 10, 9, 8, 7 and so on till 1.<br \/>\nHence, required number of solutions will be (1 + 2\u00a0+ 3 + 4 . . . . + 12) + 10 + 11<br \/>\n= 12*13\/2 + 21<br \/>\n78 + 21 = 99<\/p>\n<p><b>Question 7:\u00a0<\/b>How many different pairs(a,b) of positive integers are there such that $a\\geq b$ and $\\frac{1}{a}+\\frac{1}{b}=\\frac{1}{9}$?<\/p>\n<p><b>7)\u00a0Answer:\u00a03<\/b><\/p>\n<p class=\"text-center\"><a href=\"\/94-how-many-different-pairsab-of-positive-integers-ar-x-cat-2017-shift-2?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>$\\frac{1}{a}+\\frac{1}{b}=\\frac{1}{9}$<br \/>\n=&gt; $ab = 9(a + b)$<br \/>\n=&gt; $ab &#8211; 9(a+b) = 0$<br \/>\n=&gt; $ ab &#8211; 9(a+b) + 81 = 81$<br \/>\n=&gt; $(a &#8211; 9)(b &#8211; 9) = 81, a &gt; b$<br \/>\nHence we have the following cases,<br \/>\n$ a &#8211; 9 = 81, b &#8211; 9 = 1$ =&gt; $(a,b) = (90,10)$<br \/>\n$ a &#8211; 9 = 27, b &#8211; 9 = 3$ =&gt; $(a,b) = (36,12)$<br \/>\n$ a &#8211; 9 = 9, b &#8211; 9 = 9$ =&gt; $(a,b) = (18,18)$<br \/>\nHence there are three possible positive integral values of (a,b)<\/p>\n<p><b>Question 8:\u00a0<\/b>If $5^x &#8211; 3^y = 13438$ and $5^{x &#8211; 1} + 3^{y + 1} = 9686$, then x + y equals<\/p>\n<p><b>8)\u00a0Answer:\u00a013<\/b><\/p>\n<p class=\"text-center\"><a href=\"\/79-if-5x-3y-13438-and-5x-1-3y-1-9686-then-x-y-equals-x-cat-2019-slot-2?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>$5^x &#8211; 3^y = 13438$ and $5^{x &#8211; 1} + 3^{y + 1} = 9686$<\/p>\n<p>$5^{x} + 3^{y}*15 = 9686*5$<\/p>\n<p>$5^{x} + 3^{y}*15 = 48430$<\/p>\n<p>16*$3^y$=34992<\/p>\n<p>$3^y$ = 2187<\/p>\n<p>y = 7<\/p>\n<p>$5^x$=13438+2187=15625<\/p>\n<p>x=6<\/p>\n<p>x+y = 13<\/p>\n<p><b>Question 9:\u00a0<\/b>In 2010, a library contained a total of 11500 books in two categories &#8211; fiction and nonfiction. In 2015, the library contained a total of 12760 books in these two categories. During this period, there was 10% increase in the fiction category while there was 12% increase in the non-fiction category. How many fiction books were in the library in 2015?<\/p>\n<p>a)\u00a06160<\/p>\n<p>b)\u00a06600<\/p>\n<p>c)\u00a06000<\/p>\n<p>d)\u00a05500<\/p>\n<p><strong>9)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/87-in-2010-a-library-contained-a-total-of-11500-books-x-cat-2019-slot-2?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the number of fiction and non-fiction books in 2010 = 100a, 100b respectively<\/p>\n<p>It is given that the total number of books in 2010 = 11500<\/p>\n<p>100a+100b = 11500\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 &#8212;&#8212;-Eq 1<\/p>\n<p>The number of fiction and non-fiction books in 2015 = 110a, 112b respectively<\/p>\n<p>110a+112b = 12760\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#8212;&#8212;-Eq 2<\/p>\n<p>On solving both the equations we get, b=55, a= 60<\/p>\n<p>The number of fiction books in 2015 = 110*60=6600<\/p>\n<p><b>Question 10:\u00a0<\/b>Let a, b, x, y be real numbers such that $a^2 + b^2 = 25, x^2 + y^2 = 169$, and $ax + by = 65$. If $k = ay &#8211; bx$, then<\/p>\n<p>a)\u00a0$0 &lt; k \\leq \\frac{5}{13}$<\/p>\n<p>b)\u00a0$k &gt; \\frac{5}{13}$<\/p>\n<p>c)\u00a0$k = \\frac{5}{13}$<\/p>\n<p>d)\u00a0k = 0<\/p>\n<p><strong>10)\u00a0Answer\u00a0(D)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/93-let-a-b-x-y-be-real-numbers-such-that-a2-b2-25-x2--x-cat-2019-slot-2?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>$\\left(ax+by\\right)^2=65^2$<\/p>\n<p>$a^2x^2\\ +\\ b^2y^2+\\ 2abxy\\ =\\ 65^2$<br \/>\n$k = ay &#8211; bx$<\/p>\n<p>$k^2\\ =\\ a^2y^2+b^2x^2-2abxy$<\/p>\n<p>$(a^2 + b^2)(x^2 + y^2 )= 25* 169$<\/p>\n<p>$a^2x^2+a^2y^2+b^2x^2+b^2y^2=\\ 25\\times\\ 169$<\/p>\n<p>$k^2=\\ 65^2\\ -\\ \\left(25\\times\\ 169\\right)$<\/p>\n<p>k = 0<\/p>\n<p>D is the correct answer.<\/p>\n<p><b>Question 11:\u00a0<\/b>A gentleman decided to treat a few children in the following manner. He gives half of his total stock of toffees and one extra to the first child, and then the half of the remaining stock along with one extra to the second and continues giving away in this fashion. His total stock exhausts after he takes care of 5 children. How many toffees were there in his stock initially?<\/p>\n<p><b>11)\u00a0Answer:\u00a062<\/b><\/p>\n<p class=\"text-center\"><a href=\"\/52-a-gentleman-decided-to-treat-a-few-children-in-the-x-cat-2020-slot-1?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the initial number of chocolates be 64x.<\/p>\n<p>First child gets 32x+1 and 32x-1 are left.<\/p>\n<p>2nd child gets 16x+1\/2 and 16x-3\/2 are left<\/p>\n<p>3rd child gets 8x+1\/4 and 8x-7\/4 are left<\/p>\n<p>4th child gets 4x+1\/8 and 4x-15\/8 are left<\/p>\n<p>5th child gets 2x+1\/16 and 2x-31\/16 are left.<\/p>\n<p>Given, 2x-31\/16=0=&gt; 2x=31\/16 =&gt; x=31\/32.<\/p>\n<p>.&#8217;. Initially the Gentleman has 64x i.e. 64*31\/32 =62 chocolates.<\/p>\n<p><b>Question 12:\u00a0<\/b>Let A, B and C be three positive integers such that the sum of A and the mean of B and C is 5. In addition, the sum of B and the mean of A and C is 7. Then the sum of A and B is<\/p>\n<p>a)\u00a05<\/p>\n<p>b)\u00a04<\/p>\n<p>c)\u00a06<\/p>\n<p>d)\u00a07<\/p>\n<p><strong>12)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/76-let-a-b-and-c-be-three-positive-integers-such-that-x-cat-2020-slot-1?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Given<\/p>\n<p>A+(B+C)\/2=5 =&gt; 2A+B+C=10&#8230;.(i)<\/p>\n<p>(A+C)\/2 +B=7 =&gt; A+2B+C=14&#8230;..(ii)<\/p>\n<p>(i)-(ii)=&gt; B-A=4 =&gt; B=4+A.<\/p>\n<p>Given, A, B, C are positive integers<\/p>\n<p>If A=1=&gt;B=5 =&gt; C=3<\/p>\n<p>If A=2=&gt;B=6 =&gt; C=0 but this is invalid as C is positive.<\/p>\n<p>Similarly if A&gt;2 C will be negative and cases are not valid.<\/p>\n<p>Hence, A+B=6.<\/p>\n<p><b>Question 13:\u00a0<\/b>Dick is thrice as old as Tom and Harry is twice as old as Dick. If Dick&#8217;s age is 1 year\u00a0less than the average age of all three, then Harry&#8217;s age, in years, is<\/p>\n<p><b>13)\u00a0Answer:\u00a018<\/b><\/p>\n<p class=\"text-center\"><a href=\"\/57-dick-is-thrice-as-old-as-tom-and-harry-is-twice-as-x-cat-2020-slot-3?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let tom&#8217;s age = x<\/p>\n<p>=&gt;\u00a0Dick=3x<\/p>\n<p>=&gt;harry = 6x<\/p>\n<p>Given,<\/p>\n<p>3x+1 = (x+3x+6x)\/3<\/p>\n<p>=&gt; x= 3<\/p>\n<p>Hence, Harry&#8217;s age = 18 years<\/p>\n<p><b>Question 14:\u00a0<\/b>Let k be a constant. The equations $kx + y = 3$ and $4x + ky = 4$ have a unique solution if\u00a0and only if<\/p>\n<p>a)\u00a0$\\mid k\\mid\\neq2$<\/p>\n<p>b)\u00a0$\\mid k\\mid=2$<\/p>\n<p>c)\u00a0$k\\neq2$<\/p>\n<p>d)\u00a0$k=2$<\/p>\n<p><strong>14)\u00a0Answer\u00a0(A)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/68-let-k-be-a-constant-the-equations-kx-y-3-and-4x-ky-x-cat-2020-slot-3?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Two linear equations ax+by= c and dx+ ey = f have a unique solution if\u00a0$\\frac{a}{d}\\ne\\ \\frac{b}{e}$<\/p>\n<p>Therefore, $\\frac{k}{4}\\ne\\ \\frac{1}{k}$ =&gt;\u00a0$k^2\\ne\\ 4$<\/p>\n<p>=&gt; k\u00a0$\\ne\\ $ |2|<\/p>\n<p><b>Question 15:\u00a0<\/b>In May, John bought the same amount of rice and the same amount of wheat as he had\u00a0bought in April, but spent \u20b9 150 more due to price increase of rice and wheat by 20%\u00a0and 12%, respectively. If John had spent \u20b9 450 on rice in April, then how much did he\u00a0spend on wheat in May?<\/p>\n<p>a)\u00a0Rs.560<\/p>\n<p>b)\u00a0Rs.570<\/p>\n<p>c)\u00a0Rs.590<\/p>\n<p>d)\u00a0Rs.580<\/p>\n<p><strong>15)\u00a0Answer\u00a0(A)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/71-in-may-john-bought-the-same-amount-of-rice-and-the-x-cat-2020-slot-2?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let John buy &#8220;m&#8221; kg of rice and &#8220;p&#8221; kg of wheat.<\/p>\n<p>Now let the price of rice be &#8220;r&#8221; in April. Price in May will be &#8220;1.2(r)&#8221;<\/p>\n<p>Now let the price of wheat be &#8220;w&#8221; in April . Price in April will be &#8220;1.12(w)&#8221;.<\/p>\n<p>Now he spent \u20b9150 more in May , so 0.2(rm)+0.12(wp)=150<\/p>\n<p>Its also given that he had spent \u20b9450 on rice in April. So (rm)=450<\/p>\n<p>So 0.2(rm)= (0.2)(450)=90 Substituting we get (wp)=60\/0.12 or (wp)=500<\/p>\n<p>Amount spent on wheat in May will be 1.12(500)=\u20b9560<\/p>\n<p><b>Question 16:\u00a0<\/b>If x and y are non-negative integers such that $x + 9 = z$, $y + 1 = z$ and $x + y &lt; z + 5$, then the maximum possible value of $2x + y$ equals<\/p>\n<p><b>16)\u00a0Answer:\u00a023<\/b><\/p>\n<p class=\"text-center\"><a href=\"\/72-if-x-and-y-are-non-negative-integers-such-that-x-9-x-cat-2020-slot-2?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>We can write x=z-9 and y=z-1 Now we have x+y&lt; z+5<\/p>\n<p>Substituting we get z-9+z-1&lt;z+5 or z&lt;15<\/p>\n<p>Hence the maximum possible value of z is 14<\/p>\n<p>Maximum value of &#8220;x&#8221; is 5 and maximum value of &#8220;y&#8221; is 13<\/p>\n<p>Now 2x+y = 10+13=23<\/p>\n<p><b>Question 17:\u00a0<\/b>Aron bought some pencils and sharpeners. Spending the same amount of money as\u00a0Aron, Aditya bought twice as many pencils and 10 less sharpeners. If the cost of one\u00a0sharpener is \u20b9 2 more than the cost of a pencil, then the minimum possible number of\u00a0pencils bought by Aron and Aditya together is<\/p>\n<p>a)\u00a033<\/p>\n<p>b)\u00a027<\/p>\n<p>c)\u00a030<\/p>\n<p>d)\u00a036<\/p>\n<p><strong>17)\u00a0Answer\u00a0(A)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/73-aron-bought-some-pencils-and-sharpeners-spending-t-x-cat-2020-slot-2?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the number of pencils bought by Aron\u00a0be &#8220;p&#8221; and the cost of each pencil be &#8220;a&#8221;.<\/p>\n<p>Let the number of sharpeners bought Aron be &#8220;s&#8221; and the cost of each sharpener be &#8220;b&#8221;.<\/p>\n<p>Now amount spent by Aron will be (pa)+(sb)<\/p>\n<p>Aditya bought (2p) pencils and (s-10) sharpeners. Amount spent will be (2pa)+(s-10)b<\/p>\n<p>Amount spent in both the cases is same<\/p>\n<p>pa + sb = 2pa + (s-10)b or pa=10b<\/p>\n<p>Now its given in the question that cost of sharpener is 2 more than pencil i.e. b=a+2<\/p>\n<p>pa= 10a+20 or a=20\/(p-10)<\/p>\n<p>Now the number of pencils has to be minimum, for that we have to find smallest &#8220;p&#8221; such that both &#8220;p&#8221; and &#8220;a&#8221; are integers. The smallest such value is p=11 . Total number of pencils bought will be p+2p=11+22=33<\/p>\n<p><b>Question 18:\u00a0<\/b>A basket of 2 apples, 4 oranges and 6 mangoes costs the same as a basket of 1 apple, 4 oranges and 8 mangoes, or a basket of 8 oranges and 7 mangoes. Then the number of mangoes in a basket of mangoes that has the same cost as the other baskets is<\/p>\n<p>a)\u00a011<\/p>\n<p>b)\u00a013<\/p>\n<p>c)\u00a010<\/p>\n<p>d)\u00a012<\/p>\n<p><strong>18)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/53-a-basket-of-2-apples-4-oranges-and-6-mangoes-costs-x-cat-2021-slot-1?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the cost of an apple, an orange and a mango be a, o, and m respectively.<\/p>\n<p>Then it is given that:<\/p>\n<p>2a+4o+6m = a+4o+8m<\/p>\n<p>or a = 2m.<\/p>\n<p>Also, a+4o+8m = 8o + 7m<\/p>\n<p>10m-7m = 4o<\/p>\n<p>3m = 4o.<\/p>\n<p>We can now express the cost of a basket in terms of mangoes only:<\/p>\n<p>2a+4o+6m = 4m+3m+6m = 13m.<\/p>\n<p><b>Question 19:\u00a0<\/b>If $3x+2\\mid y\\mid+y=7$ and $x+\\mid x \\mid+3y=1$ then $x+2y$ is:<\/p>\n<p>a)\u00a0$-\\frac{4}{3}$<\/p>\n<p>b)\u00a0$\\frac{8}{3}$<\/p>\n<p>c)\u00a0$0$<\/p>\n<p>d)\u00a0$1$<\/p>\n<p><strong>19)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/66-if-3x2mid-ymidy7-and-xmid-x-mid3y1-then-x2y-is-x-cat-2021-slot-3?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>We need to check for all regions:<\/p>\n<p>x &gt;= 0, y &gt;= 0<\/p>\n<p>x &gt;= 0, y &lt; 0<\/p>\n<p>x &lt; 0, y &gt;= 0<\/p>\n<p>x &lt; 0, y &lt; 0<\/p>\n<p>However, once we find out the answer for any one of the regions, we do not need to calculate for other regions since the options suggest that there will be a single answer.<\/p>\n<p>Let us start with\u00a0<strong>x &gt;= 0, y &gt;= 0,<\/strong><\/p>\n<p>3x + 3y = 7<\/p>\n<p>2x + 3y = 1<\/p>\n<p>Hence, x = 6 and y = -11\/3<\/p>\n<p>Since y &gt; = 0, this is not satisfying the set of rules.<\/p>\n<p>Next, let us test\u00a0<strong>x &gt;= 0, y &lt; 0,<\/strong><\/p>\n<p>3x &#8211; y = 7<\/p>\n<p>2x + 3y = 1<\/p>\n<p>Hence, y = -1<\/p>\n<p>x = 2.<\/p>\n<p>This satisfies both the conditions. Hence, this is the correct point.<\/p>\n<p>WE need the value of x + 2y<\/p>\n<p>x + 2y = 2 + 2(-1) = 2 &#8211; 2 = 0.<\/p>\n<p><b>Question 20:\u00a0<\/b>A confused bank teller transposed the rupees and paise when he cashed a cheque for Shailaja, giving her rupees instead of paise and paise instead of rupees. After buying a toffee for 50 paise, Shailaja noticed that she was left with exactly three times as much as the amount on the cheque. Which of the following is a valid statement about the cheque amount?<\/p>\n<p>a)\u00a0Over Rupees 13 but less than Rupees 14<\/p>\n<p>b)\u00a0Over Rupees 7 but less than Rupees 8<\/p>\n<p>c)\u00a0Over Rupees 22 but less than Rupees 23<\/p>\n<p>d)\u00a0Over Rupees 18 but less than Rupees 19<\/p>\n<p>e)\u00a0Over Rupees 4 but less than Rupees 5<\/p>\n<p><strong>20)\u00a0Answer\u00a0(D)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/19-a-confused-bank-teller-transposed-the-rupees-and-p-x-cat-2007?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the value of cheque be x Rs and y\u00a0ps\u00a0and the amount\u00a0she received is y Rs and x ps.<\/p>\n<p>After 50 ps is deducted she has the amount which is 3 times the amount on cheque,<\/p>\n<p>So 100y+x-50=3(100x+y)\u00a0 \u00a0 (After converting the amount in paise)<\/p>\n<p>y= (299x+50)\/97 = 3x+ (8x+50)\/97<\/p>\n<p>Now both x and y are integers, so from options we put x=18, (8x+50)\/97 = 194\/97 =2 which is an integer. Hence, D is the answer.<\/p>\n<p><b>Instructions<\/b><\/p>\n<p>DIRECTIONS for the following two questions: Answer the questions on the basis of the information given below.<\/p>\n<p>A certain perfume is available at a duty-free shop at the Bangkok international airport. It is priced in the Thai currency Baht but other currencies are also acceptable. In particular, the shop accepts Euro and US Dollar at the following rates of exchange:<\/p>\n<p>US Dollar 1 = 41 Bahts<\/p>\n<p>Euro 1= 46 Bahts<\/p>\n<p>The perfume is priced at 520 Bahts per bottle. After one bottle is purchased, subsequent bottles are available at a discount of 30%. Three friends S, R and M together purchase three bottles of the perfume, agreeing to share the cost equally. R pays 2 Euros. M pays 4 Euros and 27 Thai Bahts and S pays the remaining amount in US Dollars.<\/p>\n<p><b>Question 21:\u00a0<\/b>How much does R owe to S in Thai Baht?<\/p>\n<p>a)\u00a0428<\/p>\n<p>b)\u00a0416<\/p>\n<p>c)\u00a0334<\/p>\n<p>d)\u00a0324<\/p>\n<p><strong>21)\u00a0Answer\u00a0(D)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/46-how-much-does-r-owe-to-s-in-thai-baht-x-cat-2003-leaked?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Total to be paid = 1248 Baht<\/p>\n<p>Each has to pay 1248\/3 = 416 Baht<\/p>\n<p>R paid 92 Baht<\/p>\n<p>M paid 184+27 = 211 Baht<\/p>\n<p>So, R owes S 416 &#8211; 92 = 324 Baht<\/p>\n<p><b>Question 22:\u00a0<\/b>How much does M owe to S in US Dollars?<\/p>\n<p>a)\u00a03<\/p>\n<p>b)\u00a04<\/p>\n<p>c)\u00a05<\/p>\n<p>d)\u00a06<\/p>\n<p><strong>22)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/47-how-much-does-m-owe-to-s-in-us-dollars-x-cat-2003-leaked?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Total to be paid = 1248 Baht<\/p>\n<p>Each has to pay 1248\/3 = 416 Baht<\/p>\n<p>R paid 92 Baht<\/p>\n<p>M paid 184+27 = 211 Baht<\/p>\n<p>So, R owes S 416 &#8211; 92 = 324 Baht<\/p>\n<p>M owes S 416-211 Baht = 205 Baht = 5 US Dollars<\/p>\n<p><b>Question 23:\u00a0<\/b>Which one of the following conditions must p, q and r satisfy so that the following system of linear simultaneous equations has at least one solution, such that p + q + r $\\neq$ 0?<br \/>\nx+ 2y &#8211; 3z = p<br \/>\n2x + 6y &#8211; 11z = q<br \/>\nx &#8211; 2y + 7z = r<\/p>\n<p>a)\u00a05p -2q &#8211; r = 0<\/p>\n<p>b)\u00a05p + 2q + r = 0<\/p>\n<p>c)\u00a05p + 2q &#8211; r = 0<\/p>\n<p>d)\u00a05p &#8211; 2q + r = 0<\/p>\n<p><strong>23)\u00a0Answer\u00a0(A)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/58-which-one-of-the-following-conditions-must-p-q-and-x-cat-2003-leaked?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Substitute value of p,q,r in the options only option A satisfies .<\/p>\n<p>5(x+2y-3z)-2(2x+6y-11z)-(x-2y+7z) = 5x+10y-15z-4x-12y+22z-x+2y-7z \u00a0= 0<\/p>\n<p><b>Question 24:\u00a0<\/b>A leather factory produces two kinds of bags, standard and deluxe. The profit margin is Rs. 20 on a standard bag and Rs. 30 on a deluxe bag. Every bag must be processed on machine A and on Machine B. The processing times per bag on the two machines are as follows:<br \/>\n<img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/cracku.in\/media\/question\/DI_11.png\" \/><br \/>\nThe total time available on machine A is 700 hours and on machine B is 1250 hours. Among the following production plans, which one meets the machine availability constraints and maximizes the profit?<\/p>\n<p>a)\u00a0Standard 75 bags, Deluxe 80 bags<\/p>\n<p>b)\u00a0Standard 100 bags, Deluxe 60 bags<\/p>\n<p>c)\u00a0Standard 50 bags, Deluxe 100 bags<\/p>\n<p>d)\u00a0Standard 60 bags, Deluxe 90 bags<\/p>\n<p><strong>24)\u00a0Answer\u00a0(A)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/59-a-leather-factory-produces-two-kinds-of-bags-stand-x-cat-2003-leaked?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>.Let x be no. of standard bags and y be no. of deluxe bags. According to given conditions we have 2 equations 4x+5y&lt;=700 and 6x+10y&lt;=1250. Here option A satisfies both the equations.<\/p>\n<p><b>Question 25:\u00a0<\/b>A test has 50 questions. A student scores 1 mark for a correct answer, -1\/3 for a wrong answer, and -1\/6 for not attempting a question. If the net score of a student is 32, the number of questions answered wrongly by that student cannot be less than<\/p>\n<p>a)\u00a06<\/p>\n<p>b)\u00a012<\/p>\n<p>c)\u00a03<\/p>\n<p>d)\u00a09<\/p>\n<p><strong>25)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/61-a-test-has-50-questions-a-student-scores-1-mark-fo-x-cat-2003-leaked?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the number of questions answered correctly be x and the number of questions answered wrongly be y.<\/p>\n<p>So, number of questions left unattempted = (50-x-y)<\/p>\n<p>So, x &#8211; y\/3 &#8211; (50-x-y)\/6 = 32<\/p>\n<p>=&gt; 6x &#8211; 2y &#8211; 50 + x + y = 192 =&gt; 7x &#8211; y = 242 =&gt; y = 7x &#8211; 242<\/p>\n<p>If x = 35, y = 3<\/p>\n<p>If x = 36, y = 10<\/p>\n<p>So, min. value of y is 3.<\/p>\n<p>The number of wrongly answered questions cannot be less than 3.<\/p>\n<p><b>Instructions<\/b><\/p>\n<p>Directions for the following two questions: Answer the questions on the basis of the information given below.<\/p>\n<p>In an examination, there are 100 questions divided into three groups A, B and C such that each group contains at least one question. Each question in group A carries 1 mark, each question in group B carries 2 marks and each question in group C carries 3 marks. It is known that the questions in group A together carry at least 60% of the total marks.<\/p>\n<p><b>Question 26:\u00a0<\/b>If group B contains 23 questions, then how many questions are there in group C?<\/p>\n<p>a)\u00a01<\/p>\n<p>b)\u00a02<\/p>\n<p>c)\u00a03<\/p>\n<p>d)\u00a0Cannot be determined<\/p>\n<p><strong>26)\u00a0Answer\u00a0(A)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/6-if-group-b-contains-23-questions-then-how-many-que-x-cat-2004?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Group B contains 23 questions =&gt; Marks of group B = 46<br \/>\nLet the number of questions in A be x and in C be 77-x.<br \/>\nMarks of group A = x<br \/>\nSo, x\/(x+46+3*77-3x) &gt;= 60%<br \/>\n=&gt; 5x &gt;= 3(277-2x)<br \/>\n=&gt; 11x &gt;= 831<br \/>\n=&gt; x &gt;= 75.54<br \/>\n=&gt; x = 76 (min)<br \/>\nSo, the possible number of questions in group C = 1.<\/p>\n<p><b>Question 27:\u00a0<\/b>If group C contains 8 questions and group B carries at least 20% of the total marks, which of the following best describes the number of questions in group B?<\/p>\n<p>a)\u00a011 or 12<\/p>\n<p>b)\u00a012 or 13<\/p>\n<p>c)\u00a013 or 14<\/p>\n<p>d)\u00a014 or 15<\/p>\n<p><strong>27)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/7-if-group-c-contains-8-questions-and-group-b-carrie-x-cat-2004?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the number of questions in group B be x.<br \/>\nSo, number of questions in group A = 92-x<br \/>\nMarks of group B = 2x<br \/>\n2x\/(92-x+2x+24) &gt;= 20%<br \/>\n=&gt; 10x &gt;= 116+x<br \/>\n=&gt; 9x &gt;= 116<br \/>\n=&gt; x &gt;= 12.88<br \/>\nFrom the options, x can be 13 or 14<\/p>\n<p><b>Instructions<\/b><\/p>\n<p>An airline has a certain free luggage allowance and charges for excess luggage at a fixed rate per kg. Two passengers, Raja and Praja have 60 kg of luggage between them, and are charged Rs 1200 and Rs 2400 respectively for excess luggage. Had the entire luggage belonged to one of them, the excess luggage charge would have been Rs 5400.<\/p>\n<p><b>Question 28:\u00a0<\/b>What is the weight of Praja\u2019s luggage?<\/p>\n<p>a)\u00a020 kg<\/p>\n<p>b)\u00a025 kg<\/p>\n<p>c)\u00a030 kg<\/p>\n<p>d)\u00a035 kg<\/p>\n<p>e)\u00a040 kg<\/p>\n<p><strong>28)\u00a0Answer\u00a0(D)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/3-what-is-the-weight-of-prajas-luggage-x-cat-2006?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the limit be x and the rate of charge be k per kg.<br \/>\nLet the excess luggage with Raja be R kg.<br \/>\nSo, excess luggage with Praja = 2R kg<br \/>\nNow, excess luggage with Raja + excess luggage with Praja = 60 &#8211; 2x<br \/>\nSo, 3R = 60 &#8211; 2x =&gt; R = 20 &#8211; 2x\/3 which was charged 1200 Also, if one person had the entire luggage, excess luggage would have been 60 &#8211; x, which would have been charged 5400.<br \/>\nSo the charge for the excess of (20-$\\frac{2x}{3}$) = k(20-$\\frac{2x}{3}$) = 1200\u00a0 &#8230;.(1)<br \/>\nAlso, the charge for the excess of 60-x = k(60-x) = 5400 &#8230;..(2)<br \/>\nDividing (1) by (2), we get<br \/>\n=&gt;$\\frac{\\left(60-2x\\right)}{3\\times\\ \\left(60-x\\right)}=\\frac{1200}{5400}$<br \/>\nSolving this, x = 15 kg<br \/>\nSo, Praja&#8217;s luggage = 35 kg<\/p>\n<p><b>Question 29:\u00a0<\/b>What is the free luggage allowance?<\/p>\n<p>a)\u00a010 kg<\/p>\n<p>b)\u00a015 kg<\/p>\n<p>c)\u00a020 kg<\/p>\n<p>d)\u00a025kg<\/p>\n<p>e)\u00a030kg<\/p>\n<p><strong>29)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/4-what-is-the-free-luggage-allowance-x-cat-2006?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the limit be x and the rate of charge be k per kg.<br \/>\nLet the excess luggage with Raja be R kg.<br \/>\nSo, excess luggage with Praja = 2R kg<br \/>\nNow, excess luggage with Raja + excess luggage with Praja = 60 &#8211; 2x<br \/>\nSo, 3R = 60 &#8211; 2x =&gt; R = 20 &#8211; 2x\/3 which was charged 1200 Also, if one person had the entire luggage, excess luggage would have been 60 &#8211; x, which would have been charged 5400.<br \/>\n=&gt; (60-2x)\/3*(60-x) = 1200\/5400<br \/>\nSolving this, x = 15 kg<\/p>\n<p><b>Question 30:\u00a0<\/b>A telecom service provider engages male and female operators for answering 1000 calls per day. A male operator can handle 40 calls per day whereas a female operator can handle 50 calls per day. The male and the female operators get a fixed wage of Rs. 250 and Rs. 300 per day respectively. In addition, a male operator gets Rs. 15 per call he answers and a female operator gets Rs. 10 per call she answers. To minimize the total cost, how many male operators should the service provider employ assuming he has to employ more than 7 of the 12 female operators available for the job?<\/p>\n<p>a)\u00a015<\/p>\n<p>b)\u00a014<\/p>\n<p>c)\u00a012<\/p>\n<p>d)\u00a010<\/p>\n<p><strong>30)\u00a0Answer\u00a0(D)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/28-a-telecom-service-provider-engages-male-and-female-x-cat-2005?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let x be no. of male and y be no. of female operators.<br \/>\nWe have 40x+50y=1000 .<br \/>\nSo x = 25-(5*y\/4) also 7&lt;=y&lt;=12.<br \/>\nSo y can be 8 or 12.<br \/>\nIf y=8 then x=15 and y=12 then x=10 .<br \/>\nThen we have to find total cost incurred in both the cases.<br \/>\nWe find that cost is minimum in 2nd case when no. of males are 10.<\/p>\n<p><b>Question 31:\u00a0<\/b>Every 10 years the Indian Government counts all the people living in the country. Suppose that the director of the census has reported the following data on two neighbouring villages Chota Hazri and Mota Hazri.<br \/>\nChota Hazri has 4,522 fewer males than Mota Hazri.<br \/>\nMota Hazri has 4,020 more females than males.<br \/>\nChota Hazri has twice as many females as males.<br \/>\nChota Hazri has 2,910 fewer females than Mota Hazri.<br \/>\nWhat is the total number of males in Chota Hazri?<\/p>\n<p>a)\u00a011,264<\/p>\n<p>b)\u00a014,174<\/p>\n<p>c)\u00a05,632<\/p>\n<p>d)\u00a010,154<\/p>\n<p><strong>31)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/25-every-10-years-the-indian-government-counts-all-th-x-cat-2001?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the number of males in Mota Hazri = x<br \/>\nNo. of males in Chota Hazri = x &#8211; 4522<br \/>\nLet the number of females in Mota Hazri = y<br \/>\nNo. of females in Chota Hazri = y &#8211; 2910<br \/>\n(y &#8211; 2910) = 2(x &#8211; 4522) =&gt; y = 2x &#8211; 9044 + 2910 = 2x &#8211; 6134<br \/>\nAlso y = x + 4020<br \/>\nSo, x + 4020 = 2x &#8211; 6134 =&gt; x = 10154<br \/>\nSo, number of males in Chota Hazri = 10154 &#8211; 4522 = 5632<\/p>\n<p>&nbsp;<\/p>\n<p><b>Question 32:\u00a0<\/b>A change-making machine contains one-rupee, two-rupee and five-rupee coins. The total number of coins is 300. The amount is Rs. 960. If the numbers of one-rupee coins and two-rupee coins are interchanged, the value comes down by Rs. 40. The total number of five-rupee coins is<\/p>\n<p>a)\u00a0100<\/p>\n<p>b)\u00a0140<\/p>\n<p>c)\u00a060<\/p>\n<p>d)\u00a0150<\/p>\n<p><strong>32)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/48-a-change-making-machine-contains-one-rupee-two-rup-x-cat-2001?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the number of coins of the three denominations be x, y and z respectively.<br \/>\nx+y+z = 300<br \/>\nx+2y+5z = 960<br \/>\n2x+y+5z = 920<br \/>\n=&gt; 3(x+y) + 10z = 1880<br \/>\n=&gt; 3(300 &#8211; z) + 10z = 1880<br \/>\n=&gt; 900 + 7z = 1880 =&gt; z = 980\/7 = 140<br \/>\nSo, the number of 5 rupee coins is 140<\/p>\n<p><b>Question 33:\u00a0<\/b>Two full tanks, one shaped like a cylinder and the other like a cone, contain jet fuel. The cylindrical tank holds 500 litres more than the conical tank. After 200 litres of fuel has been pumped out from each tank the cylindrical tank contains twice the amount of fuel in the conical tank. How many litres of fuel did the cylindrical tank have when it was full?<\/p>\n<p>a)\u00a0700<\/p>\n<p>b)\u00a01000<\/p>\n<p>c)\u00a01100<\/p>\n<p>d)\u00a01200<\/p>\n<p><strong>33)\u00a0Answer\u00a0(D)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/159-two-full-tanks-one-shaped-like-a-cylinder-and-the--x-cat-2000?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the current capacity of conical flask be C. So, cylinder = C+500.<\/p>\n<p>After pumping out 200 liters, C+300 = 2(C-200) =&gt; C = 700<\/p>\n<p>So, full capacity of cylinder = 700+500 = 1200<\/p>\n<p><b>Question 34:\u00a0<\/b>The owner of a local jewellery store hired three watchmen to guard his diamonds, but a thief still got in and stole some diamonds. On the way out, the thief met each watchman, one at a time. To each he gave 1\/2 of the diamonds he had then, and 2 more besides. He escaped with one diamond. How many did he steal originally?<\/p>\n<p>a)\u00a040<\/p>\n<p>b)\u00a036<\/p>\n<p>c)\u00a025<\/p>\n<p>d)\u00a0None of these<\/p>\n<p><strong>34)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/23-the-owner-of-a-local-jewellery-store-hired-three-w-x-cat-2002?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Suppose the thief stole &#8216;x&#8217; diamonds. \\<\/p>\n<p>After giving the share to the first watchman, the thief has (x\/2)-2 diamonds.<\/p>\n<p>After giving to the second watchman, the thief has (x\/4)-3 diamonds.<\/p>\n<p>After giving to the third\u00a0watchman, the thief has (x\/8)-(7\/2) diamonds.<\/p>\n<p>This is equal to 1. So, (x\/8) &#8211; 7\/2 = 1<\/p>\n<p>Solving this equation, we get x = 36<\/p>\n<p><b>Question 35:\u00a0<\/b>Mayank, Mirza, Little and Jaspal bought a motorbike for $60. Mayank paid one-half of the sum of the amounts paid by the other boys. Mirza paid one-third of the sum of the amounts paid by the other boys. Little paid one-fourth of the sum of the amounts paid by the other boys. How much did Jaspal have to pay?<\/p>\n<p>a)\u00a0$15<\/p>\n<p>b)\u00a0$13<\/p>\n<p>c)\u00a0$17<\/p>\n<p>d)\u00a0None of these<\/p>\n<p><strong>35)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/24-mayank-mirza-little-and-jaspal-bought-a-motorbike--x-cat-2002?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the amount paid by Mayank be x. So, amount paid by the other three = 2x<\/p>\n<p>=&gt; Total bill = x+2x = 3x = 60 =&gt; x = 20. So, Mayank paid 20<\/p>\n<p>Similarly, amount paid by Mirza + 3*Amount paid by Mirza = 60<\/p>\n<p>=&gt; Amount paid by Mirza = 15<\/p>\n<p>Amount paid by Little + 4*Amount paid by Little = 60<\/p>\n<p>=&gt; Amount paid by Little = 12<\/p>\n<p>So, amount paid by Jaspal = 60 &#8211; (20+15+12) = 60 &#8211; 47 = $13<\/p>\n<p><b>Question 36:\u00a0<\/b>A car rental agency has the following terms. If a car is rented for 5 hr or less, then, the charge is Rs. 60 per hour or Rs. 12 per kilometre whichever is more. On the other hand, if the car is rented for more than 5 hr, the charge is Rs. 50 per hour or Rs. 7.50 per kilometre whichever is more. Akil rented a car from this agency, drove it for 30 km and ended up playing Rs. 300. For how many hours did he rent the car?<\/p>\n<p>a)\u00a04 hr<\/p>\n<p>b)\u00a05 hr<\/p>\n<p>c)\u00a06 hr<\/p>\n<p>d)\u00a0None of these<\/p>\n<p><strong>36)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/30-a-car-rental-agency-has-the-following-terms-if-a-c-x-cat-2002?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Suppose Akil drove the car for less than 5 hrs. In this case, by distance basis, Rs 360 should be charged. This\u00a0is not the case.<\/p>\n<p>So he dove for more than 5 hrs. Cost comes more using time\u00a0basis; which is Rs 300, i.e. he used the car for 6 hours.<\/p>\n<p><b>Question 37:\u00a0<\/b>A piece of string is 40 cm long. It is cut into three pieces. The longest piece is three times as long as the middle-sized and the shortest piece is 23 cm shorter than the longest piece. Find the length of the shortest piece.<\/p>\n<p>a)\u00a027<\/p>\n<p>b)\u00a05<\/p>\n<p>c)\u00a04<\/p>\n<p>d)\u00a09<\/p>\n<p><strong>37)\u00a0Answer\u00a0(C)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/41-a-piece-of-string-is-40-cm-long-it-is-cut-into-thr-x-cat-2002?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the longest piece be x<br \/>\nShortest piece = x &#8211; 23<br \/>\nMiddle-sized piece = x\/3<br \/>\nSo, x + x &#8211; 23 + x\/3 = 40 =&gt; 7x\/3 = 63 =&gt; x = 27<br \/>\nShortest piece = 27 &#8211; 23 = 4<\/p>\n<p><b>Question 38:\u00a0<\/b>Three travellers are sitting around a fire, and are about to eat a meal. One of them has 5 small loaves of bread, the second has 3 small loaves of bread. The third has no food, but has 8 coins. He offers to pay for some bread. They agree to share the 8 loaves equally among the three travellers, and the third traveller will pay 8 coins for his share of the 8 loaves. All loaves were the same size. The second traveller (who had 3 loaves) suggests that he will be paid 3 coins, and that the first traveller be paid 5 coins. The first traveller says that he should get more than 5 coins. How much should the first traveller get?<\/p>\n<p>a)\u00a05<\/p>\n<p>b)\u00a07<\/p>\n<p>c)\u00a01<\/p>\n<p>d)\u00a0None of these<\/p>\n<p><strong>38)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/42-three-travellers-are-sitting-around-a-fire-and-are-x-cat-2002?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Suppose A, B and C have 5 pieces of bread, 3 pieces of bread and 8 coins respectively. Since in total there are 8 pieces of bread, each one should get around 2.66 bread. So A must give 2.33\u00a0part of his bread to C and B must give 0.33. Distributing the amount in the same ratio of bread contribution, A must get 7 coins and B must get 1 coin.<\/p>\n<p><b>Question 39:\u00a0<\/b>Consider the following steps :<br \/>\n1. Put x = 1, y = 2<br \/>\n2. Replace x by xy<br \/>\n3. Replace y by y +1<br \/>\n4. If y = 5 then go to step 6 otherwise go to step 5.<br \/>\n5. Go to step 2<br \/>\n6. Stop Then the final value of x equals<\/p>\n<p>a)\u00a01<\/p>\n<p>b)\u00a024<\/p>\n<p>c)\u00a0120<\/p>\n<p>d)\u00a0720<\/p>\n<p><strong>39)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/18-consider-the-following-steps-1-put-x-1-y-2-2-repla-x-cat-1990?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>1. x=1 ; y=2<\/p>\n<p>2. x=2 ; y=3<\/p>\n<p>3. x=6 ; y=4<\/p>\n<p>4. x=24 ; y=5<\/p>\n<p>Hence when y=5 , x will be 24<\/p>\n<p><b>Question 40:\u00a0<\/b>Iqbal dealt some cards to Mushtaq and himself from a full pack of playing cards and laid the rest aside. Iqbal then said to Mushtaq. &#8220;If you give me a certain number of your cards, I will have four times as many cards as you will have. If I give you the same number of cards, I will have thrice as many cards as you will have&#8221;. Of the given choices, which could represent the number of cards with Iqbal?<\/p>\n<p>a)\u00a09<\/p>\n<p>b)\u00a031<\/p>\n<p>c)\u00a012<\/p>\n<p>d)\u00a035<\/p>\n<p><strong>40)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/16-iqbal-dealt-some-cards-to-mushtaq-and-himself-from-x-cat-1991?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let&#8217;s say Iqbal has x cards initially and Mushtaq has y number of cards initially.<\/p>\n<p>So first Mushtaq gave t cards to Iqbal, hence (x+t) = 4(y-t)<\/p>\n<p>Now second time, Iqbal gave t cards to Mushtaq, hence x-t = 3(y+t)<\/p>\n<p>Solving above two equations we will get x=31t and y=9t<\/p>\n<p>And we know x+y&lt;52 hence 40t&lt;52<\/p>\n<p>because t should be a whole number it will be 1 here and x=31 and y=9<\/p>\n<p><b>Question 41:\u00a0<\/b>I bought 5 pens, 7 pencils and 4 erasers. Rajan bought 6 pens, 8 erasers and 14 pencils for an amount which was half more what I had paid. What per cent of the total amount paid by me was paid for the pens?<\/p>\n<p>a)\u00a037.5%<\/p>\n<p>b)\u00a062.5%<\/p>\n<p>c)\u00a050%<\/p>\n<p>d)\u00a0None of these<\/p>\n<p><strong>41)\u00a0Answer\u00a0(B)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/30-i-bought-5-pens-7-pencils-and-4-erasers-rajan-boug-x-cat-1996?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Let the cost of pen, pencil and eraer be x,y,z respectively<\/p>\n<p>5x+7y+4z = A<\/p>\n<p>6x+8z+14y = 3A\/2<\/p>\n<p>4x + 16\/3 z + 28\/3 y = A<\/p>\n<p>Comparing two equations<\/p>\n<p>5x+7y+4z = 4x+16\/3 z + 28\/3 y<\/p>\n<p>x = 7\/3 y + 4\/3 z<\/p>\n<p>3x = 7y+4z<\/p>\n<p>Now required percentage = $\\frac{5x}{5x+7y+4z}\\times100=\\frac{5x}{5x+3x}=62.5$%<\/p>\n<p><b>Question 42:\u00a0<\/b>Out of two-thirds of the total number of basketball matches, a team has won 17 matches and lost 3 of them. What is the maximum number of matches that the team can lose and still win more than three- fourths of the total number of matches, if it is true that no match can end in a tie?<\/p>\n<p>a)\u00a04<\/p>\n<p>b)\u00a06<\/p>\n<p>c)\u00a05<\/p>\n<p>d)\u00a03<\/p>\n<p><strong>42)\u00a0Answer\u00a0(A)<\/strong><\/p>\n<p class=\"text-center\"><a href=\"\/35-out-of-two-thirds-of-the-total-number-of-basketbal-x-cat-1996?utm_source=blog&amp;utm_medium=video&amp;utm_campaign=video_solution\" target=\"_blank\" class=\"btn btn-info \">View Video Solution<\/a><\/p>\n<p><b>Solution:<\/b><\/p>\n<p>Total matches played = 17+3\u00a0= 20<\/p>\n<p>Total matches = 20*$\\frac{3}{2}$ = 30<\/p>\n<p>Number of wins required = 75% of 30 = 22.5 = 23 wins<\/p>\n<p>23-17 = 6 more wins are required out of 10 matches to maintain 75% win recor which means there would be 4 losses.<\/p>\n<p>So, these are some of the most important CAT linear equations questions. Practice these CAT linear equations questions PDF. Do watch the detailed Video solutions provided in these CAT linear equations questions. Learn all the major formulae from these concepts. You can check out the <a href=\"https:\/\/cracku.in\/blog\/cat-formulas-pdf\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Important CAT linear equations questions &amp; Formulas PDF here<\/strong><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linear Equations is one of the key topics in the CAT Quants Section. CAT Linear Equations questions appear in the CAT and other MBA entrance exams every year. You can check out these CAT Linear Equations Questions from Previous years. In this article, we will look into some important CAT Linear Equations Questions (with Notes) [&hellip;]<\/p>\n","protected":false},"author":54,"featured_media":211775,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[3],"tags":[6,5119,222,3687],"class_list":{"0":"post-211632","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-cat","8":"tag-cat","9":"tag-cat-2022","10":"tag-cat-quant","11":"tag-linear-equation-questions"},"better_featured_image":{"id":211775,"alt_text":"CAT Linear Equations questions","caption":"CAT Linear Equations questions","description":"CAT Linear Equations 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