{"id":42790,"date":"2020-09-18T19:45:09","date_gmt":"2020-09-18T14:15:09","guid":{"rendered":"https:\/\/cracku.in\/blog\/?p=42790"},"modified":"2020-09-18T19:45:09","modified_gmt":"2020-09-18T14:15:09","slug":"maths-practice-set-for-rrb-ntpc-pdf","status":"publish","type":"post","link":"https:\/\/cracku.in\/blog\/maths-practice-set-for-rrb-ntpc-pdf\/","title":{"rendered":"Maths Practice set for RRB NTPC PDF"},"content":{"rendered":"

Maths Practice set for RRB NTPC PDF<\/strong><\/span><\/h2>\n

Download RRB NTPC Top-20 Maths Practice set PDF. Top 20 RRB NTPC questions based on asked questions in previous exam papers very important for the Railway NTPC exam.<\/p>\n

Download Maths practice set for RRB NTPC PDF <\/a><\/p>\n

Take a free mock test for RRB NTPC<\/a><\/p>\n

Download RRB NTPC Previous Papers PDF<\/a><\/p>\n\n

Question 1:\u00a0<\/b>The smallest positive integer n with 24 divisors considering 1 and n as divisors is<\/p>\n

a)\u00a0420<\/p>\n

b)\u00a0240<\/p>\n

c)\u00a0360<\/p>\n

d)\u00a0480<\/p>\n

Question 2:\u00a0<\/b>In an election a candidate gets 40% of votes polled and is defeated by the winning candidate by 298 votes. Find the total number of votes polled.<\/p>\n

a)\u00a01360<\/p>\n

b)\u00a01490<\/p>\n

c)\u00a01520<\/p>\n

d)\u00a01602<\/p>\n

Question 3:\u00a0<\/b>Two numbers are less than the third number by 30% and 37% respectively. By what percent is the second number less than the first number?<\/p>\n

a)\u00a015%<\/p>\n

b)\u00a010%<\/p>\n

c)\u00a025%<\/p>\n

d)\u00a020%<\/p>\n

Question 4:\u00a0<\/b>What is the median of the following list of numbers: 55. 53, 56, 59. 61, 69, and 31?<\/p>\n

a)\u00a055<\/p>\n

b)\u00a056<\/p>\n

c)\u00a059<\/p>\n

d)\u00a061<\/p>\n

Question 5:\u00a0<\/b>If the arithmetic mean of 10 numbers is 35 and each number is increased by 2, find the mean of the new set of numbers.<\/p>\n

a)\u00a028<\/p>\n

b)\u00a034<\/p>\n

c)\u00a040<\/p>\n

d)\u00a037<\/p>\n

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RRB NTPC Previous Papers [Download PDF]<\/a><\/p>\n

Question 6:\u00a0<\/b>A train \u2018A\u2019 of 180 metres is running at the rate of 72 km\/hr. Another train \u2018B\u2019 of 120 metres is coming from opposite direction is the rate of 108 km\/hr. How long will they take to cross one another ?<\/p>\n

a)\u00a024 sec<\/p>\n

b)\u00a012 sec<\/p>\n

c)\u00a06 sec<\/p>\n

d)\u00a030 sec<\/p>\n

Question 7:\u00a0<\/b>A man went to his office on cycle at the rate of 10 km\/hr and reached late by 6 minutes. When he increased the speed by 2 km\/hr, he reached 6 minutes before time. What is the distance between his office and his departure point ?<\/p>\n

a)\u00a06 km<\/p>\n

b)\u00a07 km<\/p>\n

c)\u00a012 km<\/p>\n

d)\u00a016 km<\/p>\n

Question 8:\u00a0<\/b>10 persons can build a wall in 8 days. How many persons can build this wall in half day ?<\/p>\n

a)\u00a080<\/p>\n

b)\u00a0100<\/p>\n

c)\u00a0120<\/p>\n

d)\u00a0160<\/p>\n

Question 9:\u00a0<\/b>A train of 150 metres crosses a railway bridge in 26 seconds at a speed of 90 km\/hr. What is the length of this bridge ?<\/p>\n

a)\u00a0500 metres<\/p>\n

b)\u00a060 metres<\/p>\n

c)\u00a0650 metres<\/p>\n

d)\u00a0550 metres<\/p>\n

Question 10:\u00a0<\/b>If the length of a rectangle is decreased by 5 metres and breadth increased by 3 metres, its area decreases by 9 $ m^{2} $. If its length is increased by 3 m and breadth by 2 m,its area increases by 67 $ m^{2} $. What is the length of a rectangle ?<\/p>\n

a)\u00a08 m<\/p>\n

b)\u00a015.6 m<\/p>\n

c)\u00a017 m<\/p>\n

d)\u00a018.5 m<\/p>\n

Download General Science Notes PDF<\/a><\/p>\n

Question 11:\u00a0<\/b>There is a path 1 m wide outside a rectangular field of 16 m length and 11m breadth then the total area of the path is<\/p>\n

a)\u00a058 sq.m<\/p>\n

b)\u00a068 sq.m<\/p>\n

c)\u00a036 sq.m<\/p>\n

d)\u00a028 sq.m<\/p>\n

Question 12:\u00a0<\/b>The value of $cos^{2}$90\u00b0- $sin^{2}$90\u00b0 is<\/p>\n

a)\u00a01<\/p>\n

b)\u00a0$\\frac{1}{2}$<\/p>\n

c)\u00a0-1<\/p>\n

d)\u00a0None of these<\/p>\n

Question 13:\u00a0<\/b>A triangle has a perimeter of 200. If two of its sides are equal and the third side is 20 more than the equal sides, what is the length of the third side?<\/p>\n

a)\u00a060<\/p>\n

b)\u00a050<\/p>\n

c)\u00a080<\/p>\n

d)\u00a070<\/p>\n

Question 14:\u00a0<\/b>A ladder 20 m long is leaning against a vertical wall. It makes an angle of 30\u00b0 with the ground. How high on the wall does the ladder reach?<\/p>\n

a)\u00a010 m<\/p>\n

b)\u00a017.32 m<\/p>\n

c)\u00a034.64 m<\/p>\n

d)\u00a030 m<\/p>\n

Question 15:\u00a0<\/b>A invested Rs 10,000 for 9 months and B invested Rs 18,000 for some times in a business If the profits of A and B are equal then the period of time for which B\u2019s capital was invested is<\/p>\n

a)\u00a06 months<\/p>\n

b)\u00a05 months<\/p>\n

c)\u00a04 months<\/p>\n

d)\u00a03 months<\/p>\n

FREE RRB NTPC YOUTUBE VIDEOS<\/a><\/p>\n

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

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

For any given number, that can be represented as $ A^{x} \\times B ^ {y} $, etc<\/p>\n

The number of factors is denoted by (x+1) x ( y+1), etc<\/p>\n

360 = $ 2 ^ {3} \\times 3 ^ {2} \\times 5^ {1}$<\/p>\n

So the number of factors = (3 +1) x (2+ 1) (1+ 1) = 4x3x2 = 24<\/p>\n

For 240, it is\u00a0$ 2 ^ {4} \\times 3 ^ {1} \\times 5^ {1}$<\/p>\n

Number of factors = 5 x 2 x 2 = 20 only<\/p>\n

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

There is an assumption in the question that there are only two candidates participating in the election. One candidate got 40% votes and the other candidate got 60% votes. The difference is 20% votes which are 298. If 298 votes are 20%, 100% is how much.<\/p>\n

= 298\/20% = 1490<\/p>\n

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

Let the third number be x. So, the first number is .7x<\/p>\n

The second number is .63x<\/p>\n

So, the second number is less than the first number by .7 ie 10% of the first number.<\/p>\n

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

If we organise above numbers in ascending order then we will get following sequence:<\/p>\n

31,55.53,56,59.61,69.<\/p>\n

There are total 5 numbers present in the series.<\/p>\n

So,for an odd number of series median would be the middle term of the series.<\/p>\n

Here middle term in the series is 56.<\/p>\n

So,median would be 56.<\/p>\n

B is correct choice.<\/p>\n

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

It is the property of arithmetic mean<\/p>\n

If we increase variable by same no. that is any constant k then the mean will also be increase by k<\/p>\n

For eg.<\/p>\n

X x+2<\/p>\n

1 3<\/p>\n

2 4<\/p>\n

3 5<\/p>\n

4 6<\/p>\n

5 7<\/p>\n

— —<\/p>\n

15 25<\/p>\n

— —<\/p>\n

Mean = $15\\div 5$=3<\/p>\n

Mean for x+2= $25\\div 5$=5<\/p>\n

so in this question<\/p>\n

Mean =35<\/p>\n

Increased no. =2<\/p>\n

Then increased mean = 37<\/p>\n

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

Speed of the train A = 72 * 5 \/18 = 20 m\/s<\/p>\n

Speed of train B = 108 * 5\/18 = 30 m\/s<\/p>\n

Total time to cross each other = total distance \/ total speed<\/p>\n

= 300\/50 = 6 seconds<\/p>\n

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

Let the distance be d.<\/p>\n

D\/10 = T+ 1\/10<\/p>\n

D\/12 = T\u00a0– 1\/10<\/p>\n

So, D = 12 kilometers.<\/p>\n

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

10 people can build a wall in 8 days<\/p>\n

80 people can build a wall in 1 day<\/p>\n

160 people can build a wall in half day.<\/p>\n

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

90 kmph = 90 * 5 \/18 = 25 m\/s<\/p>\n

(150 + x ) \/ 26 = 25<\/p>\n

So, x = 500 mts<\/p>\n

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

(l – 5)(b+3) = lb – 9 …. (1)<\/p>\n

(l+ 3)(b+2) = lb + 67 …… (2)<\/p>\n

(1) => lb – 5b + 3l -15 = lb – 9<\/p>\n

or 3l – 5b = 6<\/p>\n

(2) = > lb + 3b + 2l + 6 = lb + 67<\/p>\n

or 2l + 3b = 61<\/p>\n

from these equations, l = 17 m<\/p>\n

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

The area of the bigger rectangle is 18 x 13<\/p>\n

The are of the smaller rectangle is 16 x 11<\/p>\n

The required value is 18 x 13 – 16 x 11 = 58 sq.m<\/p>\n

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

Cos 90 = 0<\/p>\n

sin 90 = 1<\/p>\n

So, the given expression is 0 – 1 = -1<\/p>\n

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

Let the equal side be x.<\/p>\n

x + x + x + 20 = 200<\/p>\n

x = 60<\/p>\n

Length of third side = 80<\/p>\n

So, the answer would be option c)80.<\/p>\n

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

From the given information, Below is the figure formed.<\/p>\n

<\/figure>\n

From the figure,We can say $\u00a0 Sin 30 = \\frac{height of wall}{height of ladder} $<\/p>\n

=> $ \\frac{1}{2}=\\frac{height of wall}{20} $<\/p>\n

=> height of wall = 10m<\/p>\n

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

A’s profit = 10,000 x 9 x r\/100<\/p>\n

B’s profit = 18000 x t x r\/100<\/p>\n

But the profits are same so,<\/p>\n

10,000 x 9 x r\/100 \u00a0= 18000 x t x r\/100<\/p>\n

so, t = 5 months.<\/p>\n

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

We hope this Maths Practice set\u00a0 pdf for RRB NTPC exam will be highly useful for your Preparation.<\/p>\n","protected":false},"excerpt":{"rendered":"

Maths Practice set for RRB NTPC PDF Download RRB NTPC Top-20 Maths Practice set PDF. Top 20 RRB NTPC questions based on asked questions in previous exam papers very important for the Railway NTPC exam. Download RRB NTPC Previous Papers PDF Question 1:\u00a0The smallest positive integer n with 24 divisors considering 1 and n as […]<\/p>\n","protected":false},"author":49,"featured_media":42801,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[3167,169,125,1679,1897,1605,1603],"tags":[4181,3529,4117,492,1635,1593],"class_list":{"0":"post-42790","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-downloads-en","8":"category-downloads","9":"category-featured","10":"category-rrb-group-d","11":"category-rrb-group-d-2","12":"category-rrb-je","13":"category-rrb-ntpc","14":"tag-maths-practice-set","15":"tag-maths-questions","16":"tag-railway-exams","17":"tag-rrb-group-d","18":"tag-rrb-je","19":"tag-rrb-ntpc"},"better_featured_image":{"id":42801,"alt_text":"Maths Practice set for RRB NTPC 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