{"id":35217,"date":"2019-09-24T17:53:04","date_gmt":"2019-09-24T12:23:04","guid":{"rendered":"https:\/\/cracku.in\/blog\/?p=35217"},"modified":"2019-09-24T17:53:04","modified_gmt":"2019-09-24T12:23:04","slug":"number-system-questions-for-rrb-group-d-set-3-pdf","status":"publish","type":"post","link":"https:\/\/cracku.in\/blog\/number-system-questions-for-rrb-group-d-set-3-pdf\/","title":{"rendered":"Number System Questions for RRB Group-D Set-3 PDF"},"content":{"rendered":"

Number System Questions for RRB Group-D Set-3 PDF<\/strong><\/span><\/h2>\n

Download Top-10 RRB Group-D Number System Questions set – 3 PDF.\u00a0RRB GROUP-D Maths questions based on asked questions in previous exam papers very important for the Railway Group-D exam.<\/p>\n

Download Number System Questions for RRB Group-D Set-3 PDF<\/a><\/p>\n\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>Sum of two positive integers is 15 and product of them is 50. What will be the L.C.M. of the numbers?<\/p>\n

a)\u00a050<\/p>\n

b)\u00a030<\/p>\n

c)\u00a040<\/p>\n

d)\u00a010<\/p>\n

Question 2:\u00a0<\/b>If the product of the two numbers is 525 and L.C.M. of the numbers is 105, what will be the H.C.F. of the numbers?<\/p>\n

a)\u00a03<\/p>\n

b)\u00a04<\/p>\n

c)\u00a05<\/p>\n

d)\u00a06<\/p>\n

Question 3:\u00a0<\/b>14 is the HCF of two numbers \u2018p\u2019 and \u2018q\u2019, where 14 < p < q. What is the minimum values of (p,q)?<\/p>\n

a)\u00a042, 28<\/p>\n

b)\u00a028, 14<\/p>\n

c)\u00a014, 28<\/p>\n

d)\u00a028, 42<\/p>\n

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Question 4:\u00a0<\/b>Find the greatest number that divides 82, 147 and 199 so as to leave the same remainder in each case.<\/p>\n

a)\u00a07<\/p>\n

b)\u00a011<\/p>\n

c)\u00a013<\/p>\n

d)\u00a017<\/p>\n

Question 5:\u00a0<\/b>Find the largest 4 digit number that is divisible by 78.<\/p>\n

a)\u00a09996<\/p>\n

b)\u00a09988<\/p>\n

c)\u00a09976<\/p>\n

d)\u00a09984<\/p>\n

Question 6:\u00a0<\/b>Find the remainder when $79^{79}+79$ is divided by 80.<\/p>\n

a)\u00a078<\/p>\n

b)\u00a01<\/p>\n

c)\u00a079<\/p>\n

d)\u00a02<\/p>\n

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

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Question 7:\u00a0<\/b>The product of two numbers is 7920 and their HCF is 12. Find the number of pairs of such numbers possible.<\/p>\n

a)\u00a01<\/p>\n

b)\u00a02<\/p>\n

c)\u00a03<\/p>\n

d)\u00a04<\/p>\n

Question 8:\u00a0<\/b>The sum of first 50 natural numbers is:<\/p>\n

a)\u00a01225<\/p>\n

b)\u00a01250<\/p>\n

c)\u00a01300<\/p>\n

d)\u00a01275<\/p>\n

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

Question 9:\u00a0<\/b>The largest 5 digit number divisible by 99 is<\/p>\n

a)\u00a099999<\/p>\n

b)\u00a099990<\/p>\n

c)\u00a099991<\/p>\n

d)\u00a099980<\/p>\n

Question 10:\u00a0<\/b>How many numbers between 1 and 1000 is divisible by 9?<\/p>\n

a)\u00a0111<\/p>\n

b)\u00a0110<\/p>\n

c)\u00a0108<\/p>\n

d)\u00a0114<\/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

Let\u2019s say one of the number is x, hence another number will be 15-x
\nHence, their product will be = $15x – x^2 = 50$
\nSo after solving the above equation, we will get numbers as 10 and 5 and their L.C.M. will be 10<\/p>\n

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

As we know that the product of the two numbers = (L.C.M. of the numbers)*(H.C.F. of the numbers)
\nHence, 525 = 105*(H.C.F.)
\nH.C.F. = 5<\/p>\n

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

Let the two numbers be 14x and 14y, where x and y are co-prime.
\nx, y > 1. The least possible values of x and y are 2 and 3 respectively.
\nSo, the value of p is 14*2 = 28 and the value of q is 14*3 = 42<\/p>\n

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

147 – 82 = 65
\n199 – 147 = 52
\nThe HCF of these differences is the number that divides all the three numbers leaving the same remainder.
\n65 = 13 * 5
\n52 = 13 * 4
\n=> HCF = 13
\nHence, 13 is the answer.<\/p>\n

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

78*10 = 780
\n78 * 3 = 234
\nOn adding the above, we get 78 * 13 = 1014
\n=> 78 * 130 = 10140
\n78 * 2 = 156
\nOn subtracting the above, we get 78 * 128 = 9984
\n=> 9984 is the answer.<\/p>\n

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

($79^{79}+79$ mod 80) can be written as ($(-1)^{79}+79$ mod 80)
\n= (-1 + 79) mod 80
\n= 78 mod 80
\n= 78<\/p>\n

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

Let the two numbers be 12x and 12y
\n12x*12y = 7920
\nxy = 55 = 5*11 = 55*1
\nThe two numbers can be [(12*5),(12*11)],[(12*55),(12*1)]<\/p>\n

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

Sum of first n natural numbers = n(n+1)\/2
\nSum of first 50 natural numbers = 50*51\/2 = 1275<\/p>\n

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

Largest 5 digit number is 99999. This number on division by 99 gives 9 as a remainder.
\nThe largest 5 digit number is 99999-9 = 99990<\/p>\n

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

Smallest number divisible by 9 in the given range is 9
\nLargest number in the given range is 999 which is divisible by 9.
\nThe series goes like this:9, 18, 27, 36, 45……,999
\n999 = 9+(n-1)9
\n9(n-1) = 999-9 = 990
\nn-1 = 110
\nn = 111<\/p>\n\n

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We hope this Number System Questions set – 3 PDF for RRB Group-D Exam will be highly useful for your preparation.<\/p>\n","protected":false},"excerpt":{"rendered":"

Number System Questions for RRB Group-D Set-3 PDF Download Top-10 RRB Group-D Number System Questions set – 3 PDF.\u00a0RRB GROUP-D Maths 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:\u00a0Sum of two positive […]<\/p>\n","protected":false},"author":41,"featured_media":35227,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[169,125,31,1679,1601],"tags":[1637,1976,2052,1647],"class_list":{"0":"post-35217","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":"category-rrb-ntpc-je","12":"tag-rrb-exam","13":"tag-rrb-group-d-2019","14":"tag-rrb-maths","15":"tag-rrb-mocks"},"better_featured_image":{"id":35227,"alt_text":"Number System Questions for RRB Group-D Set-3 PDF","caption":"Number System Questions for RRB Group-D Set-3 PDF","description":"Number System Questions for RRB Group-D Set-3 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