{"id":27511,"date":"2019-04-16T16:56:51","date_gmt":"2019-04-16T11:26:51","guid":{"rendered":"https:\/\/cracku.in\/blog\/?p=27511"},"modified":"2019-04-16T16:56:51","modified_gmt":"2019-04-16T11:26:51","slug":"mathematics-questions-for-rrb-group-d-pdf","status":"publish","type":"post","link":"https:\/\/cracku.in\/blog\/mathematics-questions-for-rrb-group-d-pdf\/","title":{"rendered":"Mathematics Questions For RRB Group-D PDF"},"content":{"rendered":"

Mathematics Questions For RRB Group-D PDF<\/strong><\/span><\/h2>\n

Download Top 20 RRB Group-D Mathematics Questions and Answers PDF. RRB Group-D Mathematics questions based on asked questions in previous exam papers very important for the Railway Group-D exam.<\/p>\n

Download Mathematics Questions For RRB Group-D PDF<\/a><\/p>\n

Download RRB Group-D Previous Papers PDF<\/a><\/p>\n

Take a RRB Group-D free mock test<\/a><\/p>\n

Question 1:\u00a0<\/b>Which of the following is the arithmetic mean of $ 2X^{2}-10, 30-X^{2} and -X^{2}+6X+10 $ ?<\/p>\n

a)\u00a03X+15<\/p>\n

b)\u00a06X+10<\/p>\n

c)\u00a02X+30<\/p>\n

d)\u00a02X+10<\/p>\n

Question 2:\u00a0<\/b>$ (1-\\frac{1}{2}) (1-\\frac{1}{3}) (1-\\frac{1}{4}) …..(1-\\frac{1}{40}) = ?$<\/p>\n

a)\u00a0$ \\frac{1}{40} $<\/p>\n

b)\u00a0$ \\frac{1}{20} $<\/p>\n

c)\u00a0Countless<\/p>\n

d)\u00a0Zero<\/p>\n

Question 3:\u00a0<\/b>How many prime numbers exist between 60 and 100?<\/p>\n

a)\u00a08<\/p>\n

b)\u00a09<\/p>\n

c)\u00a07<\/p>\n

d)\u00a06<\/p>\n

Question 4:\u00a0<\/b>What is the least number that must be added to 3300 to make it a perfect square?<\/p>\n

a)\u00a04<\/p>\n

b)\u00a016<\/p>\n

c)\u00a064<\/p>\n

d)\u00a036<\/p>\n

Question 5:\u00a0<\/b>Which of the following is divisible by 11?<\/p>\n

a)\u00a0567899<\/p>\n

b)\u00a0987657<\/p>\n

c)\u00a0345656<\/p>\n

d)\u00a0123456<\/p>\n

Take a free mock test for RRB Group-D<\/a><\/p>\n\n

Question 6:\u00a0<\/b>$\\frac{13.33*13.33*13.33-6.33*6.33*6.33}{13.33*13.33+13.33*6.33+6.33*6.33}$ = ?<\/p>\n

a)\u00a07<\/p>\n

b)\u00a014<\/p>\n

c)\u00a020<\/p>\n

d)\u00a019.66<\/p>\n

Question 7:\u00a0<\/b>1000 $\\div$ 20 x 10 + 50 x 10 – 100 = ?<\/p>\n

a)\u00a0700<\/p>\n

b)\u00a0800<\/p>\n

c)\u00a0900<\/p>\n

d)\u00a01000<\/p>\n

Question 8:\u00a0<\/b>$100 \\times 10 – 100 + 2000 \\div 100 = ?$<\/p>\n

a)\u00a029<\/p>\n

b)\u00a0920<\/p>\n

c)\u00a0980<\/p>\n

d)\u00a01000<\/p>\n

Question 9:\u00a0<\/b>The simplest form of $\\frac{391}{667}$ is<\/p>\n

a)\u00a0$\\frac{23}{31}$<\/p>\n

b)\u00a0$\\frac{19}{23}$<\/p>\n

c)\u00a0$\\frac{15}{19}$<\/p>\n

d)\u00a0$\\frac{17}{29}$<\/p>\n

Question 10:\u00a0<\/b>What is the average of 56, 45, 47, 61, 49, 54 and 52<\/p>\n

a)\u00a052<\/p>\n

b)\u00a054<\/p>\n

c)\u00a049.12<\/p>\n

d)\u00a063<\/p>\n

RRB Group D previous year papers<\/a><\/p>\n

Daily Free RRB Online Test<\/a><\/p>\n

Question 11:\u00a0<\/b>What will be the value of –
\n45% of 550 + 39% of 600<\/p>\n

a)\u00a0470.5<\/p>\n

b)\u00a0480.5<\/p>\n

c)\u00a0490.5<\/p>\n

d)\u00a0481.5<\/p>\n

Question 12:\u00a0<\/b>If 6 out of 150 people have lost the match then what percentage of the people have won the match?<\/p>\n

a)\u00a080%<\/p>\n

b)\u00a090%<\/p>\n

c)\u00a096%<\/p>\n

d)\u00a086%<\/p>\n

Question 13:\u00a0<\/b>If the number 254a8b is divisible by 10 as well as 9, find the value of a.<\/p>\n

a)\u00a08<\/p>\n

b)\u00a09<\/p>\n

c)\u00a06<\/p>\n

d)\u00a07<\/p>\n

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Question 14:\u00a0<\/b>Find the value of \u201ca\u201d if $x^4 – 5x^3 + 4x^2 + 3x – a$ is divisible by x-1?<\/p>\n

a)\u00a01<\/p>\n

b)\u00a02<\/p>\n

c)\u00a03<\/p>\n

d)\u00a04<\/p>\n

Question 15:\u00a0<\/b>What is the value of 21*2.9 + 72?<\/p>\n

a)\u00a0122.9<\/p>\n

b)\u00a0132.9<\/p>\n

c)\u00a0133.8<\/p>\n

d)\u00a0143.8<\/p>\n

Question 16:\u00a0<\/b>Find the value of the following expression:$1001\\div 91+27-12*4$<\/p>\n

a)\u00a0106<\/p>\n

b)\u00a0-25<\/p>\n

c)\u00a0-10<\/p>\n

d)\u00a0104<\/p>\n

RRB Group-D Important Questions (download PDF)<\/a><\/p>\n\n

Question 17:\u00a0<\/b>$\\sqrt{121}+\\sqrt{1.44}+\\sqrt{0.1024}+\\sqrt{2.25} = ?$<\/p>\n

a)\u00a013.53<\/p>\n

b)\u00a013.93<\/p>\n

c)\u00a014.02<\/p>\n

d)\u00a014.22<\/p>\n

Question 18:\u00a0<\/b>If \u2018+\u2019 means \u2018-\u2019, \u2018-\u2019 means \u2018*\u2019, \u2018*\u2019 means \u2018\/\u2019 and \u2018\/\u2019 means \u2018+\u2019, then what is the value of the following expression?
\n13 – 13 \/ 3 – 63 * 9 + 2 -5<\/p>\n

a)\u00a0170<\/p>\n

b)\u00a0180<\/p>\n

c)\u00a0190<\/p>\n

d)\u00a0200<\/p>\n

Question 19:\u00a0<\/b>$\\frac{6}{8}\\times \\frac{16}{18} \\times \\frac{3}{4} \\times X = \\frac{4}{7}$, find $1\/X$ ?<\/p>\n

a)\u00a04\/7<\/p>\n

b)\u00a08\/7<\/p>\n

c)\u00a07\/8<\/p>\n

d)\u00a07\/4<\/p>\n

Question 20:\u00a0<\/b>Find the sum of the cubes of the first 11 natural numbers ?<\/p>\n

a)\u00a04666<\/p>\n

b)\u00a04756<\/p>\n

c)\u00a04256<\/p>\n

d)\u00a04356<\/p>\n

General Science Notes for RRB Exams (PDF)<\/a><\/p>\n\n

Answers & Solutions:<\/strong><\/span><\/p>\n

1)\u00a0Answer\u00a0(D)<\/strong><\/p>\n

Mean = sum\/3<\/p>\n

=\u00a0$ (2X^{2}-10 + 30-X^{2} -X^{2}+6X+10) $\/3<\/p>\n

= 2x + 10<\/p>\n

2)\u00a0Answer\u00a0(A)<\/strong><\/p>\n

1 – 1\/2 = 1\/2<\/p>\n

1 – 1\/3 = 2\/3<\/p>\n

1 – 1\/4 = 3\/4<\/p>\n

The denominator of the first term gets cancelled by the numerator of the second term and so on…<\/p>\n

So, the final value = 1\/40<\/p>\n

3)\u00a0Answer\u00a0(A)<\/strong><\/p>\n

61, 67, 71, 73, 79, 81, 87 and 97 are the prime numbers between 61 and 100.
\n=> There are 8 such numbers.<\/p>\n

4)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

$60^2$ = 3600
\n$59^2$ = 3481
\n$58^2$ = 3364
\n$57^2$ = 3249
\nHence, the least number that must be added to 3300 to make it a perfect square is 64.<\/p>\n

5)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

Difference of sum of odd placed digits and sum of even placed digits must be divisible by 11.
\nOption A => (5+7+9) – (6+8+9) = -2
\nOption B => (9+7+5) – (8+6+7) = 0 => Divisible by 11.<\/p>\n

6)\u00a0Answer\u00a0(A)<\/strong><\/p>\n

This is in the form of $a^3-b^3$ = $(a-b)(a^2+ab+b^2)$
\n=> $\\frac{13.33*13.33*13.33-6.33*6.33*6.33}{13.33*13.33+13.33*6.33+6.33*6.33}$ = 13.33 – 6.33 = 7<\/p>\n

7)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

Use BODMAS rule here.
\nDivision must be done first => 50 x 10 + 50 x 10 – 100
\nMultiplication must be done next => 500 + 500 – 100 = 900<\/p>\n

8)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

By BODMAS, Division and Multiplication will be done before addition and subtraction.<\/p>\n

Hence, 100 x 10 – 100 + 2000 \/ 100 = 1000 – 100 + 20 = 920<\/p>\n

9)\u00a0Answer\u00a0(D)<\/strong><\/p>\n

$\\frac{391}{667}$ = $\\frac{17 \\times 23}{29 \\times 23}$ = $\\frac{17}{29}$<\/p>\n

10)\u00a0Answer\u00a0(A)<\/strong><\/p>\n

We see that the numbers are distributed around 50.
\nSo we find the differences around 50
\nEstimated mean= 50
\nSum = +6-5-3+11-1+4+2 =14
\nn=7<\/p>\n

Actual mean = 50 + 14\/7 = 52.<\/p>\n

11)\u00a0Answer\u00a0(D)<\/strong><\/p>\n

45% of 550 can be calculated as (40+5)% of 550 i.e. 220+27.5 = 247.5
\nAnd 39% of 600 can be calculated as (40-1)% of 600 i.e. 240-6 = 234
\nHence, their summation will be = 481.5<\/p>\n

12)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

The number of people who lost the match is 6.
\nSo, the number of people who won the match is 150-6 = 144
\nHence, the percentage of people who won the match is 144\/150 = 24\/25 = 96%<\/p>\n

13)\u00a0Answer\u00a0(A)<\/strong><\/p>\n

Since the number is divisible by 10, b = 0. Since the number is divisible by 9, the sum of the digits is also divisible by 9.
\n19+a+b should be divisible by 9. Since b = 0, only a = 8, satisfy this criteria.<\/p>\n

14)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

f(x) = $x^4 – 5x^3 + 4x^2 + 3x – a$
\nf(x) is divisible by (x-1) if f(1) = 0.
\nf(1) = 1-5+4+3-a = 0
\n3-a = 0
\na = 3<\/p>\n

15)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

21*2.9 = 60.9
\nThe expression boils down to 60.9 + 72 = 132.9<\/p>\n

16)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

$1001\\div 91+27-12*4 = 11+27-48 = -10$<\/p>\n

17)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

$\\sqrt{121}+\\sqrt{1.44}+\\sqrt{0.1024}+\\sqrt{2.25} = 11+1.2+0.32+1.5 = 14.02$<\/p>\n

18)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

Let us replace the symbols with the actual operators.<\/p>\n

13 – 13 \/ 3 – 63 * 9 + 2 -5 = 13 * 13 + 3*63\/9 – 2*5<\/p>\n

Applying BODMAS rule, we get, 169 + 3*7 – 10 = 180
\nTherefore, option B is the right answer.<\/p>\n

19)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

$\\frac{6}{8}\\times \\frac{16}{18} \\times \\frac{3}{4} \\times X = \\frac{4}{7}$<\/p>\n

$\\frac{3}{4}\\times \\frac{8}{9} \\times \\frac{3}{4} \\times X = \\frac{4}{7}$<\/p>\n

$\\frac{1}{2} \\times X = \\frac{4}{7}$<\/p>\n

$X = 8\/7$<\/p>\n

$1\/X = 7\/8$<\/p>\n

So the answer is option B.<\/p>\n

20)\u00a0Answer\u00a0(D)<\/strong><\/p>\n

Sum of the cubes of 1st n natural numbers = $\\frac{n^2(n+1)^2}{4}$<\/p>\n

Sum of the cubes of 1st 11 natural numbers = $\\frac{11^2(11+1)^2}{4} = \\frac{17424}{4} = 4356$<\/p>\n

So the answer is option D.<\/p>\n\n

DOWNLOAD APP FOR RRB FREE MOCKS<\/a><\/p>\n

We hope this Mathematics Questions for RRB Group-D Exam will be highly useful for your preparation.<\/p>\n","protected":false},"excerpt":{"rendered":"

Mathematics Questions For RRB Group-D PDF Download Top 20 RRB Group-D Mathematics Questions and Answers PDF. RRB Group-D Mathematics questions based on asked questions in previous exam papers very important for the Railway Group-D exam. Download RRB Group-D Previous Papers PDF Take a RRB Group-D free mock test Question 1:\u00a0Which of the following is the […]<\/p>\n","protected":false},"author":41,"featured_media":27524,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[169,125,31,1679],"tags":[489,491,1819,1647],"class_list":{"0":"post-27511","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-downloads","8":"category-featured","9":"category-railways","10":"category-rrb-group-d","11":"tag-railway-exam","12":"tag-rrb","13":"tag-rrb-group-d-exam","14":"tag-rrb-mocks"},"better_featured_image":{"id":27524,"alt_text":"Mathematics Questions for RRB Group-D PDF","caption":"Mathematics Questions for RRB Group-D PDF","description":"Mathematics Questions for RRB Group-D 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