# Maths Questions for RRB NTPC: 18 Sept 2020

48.       The product of 2 numbers is 35828 and their HCF is 26. Find their LCM.

A. 931788

B. 689

C. 1378

D. 3583

51.       Raj scored 67, 69, 78 and 88 in 4 of his subjects. What should be his score in the 5th subject so that his averabe equals 80?

A. 80

B. 90

C. 96

D. 98

64.       Calculate the amount on Rs. 37,500 @ 8% p.a. compounded half yearly for 1.5 years.

A. Rs. 42,182.40

B. Rs. 42,000

C. Rs. 42,120

D. Rs. 42,812.40

65.       How many prime numbers are there between 50 and 100?

A. 6

B. 10

C. 13

D. 5

66.       What percent of 1 hour is 1 minute and 12 seconds?

A. 2%

B. 12%

C. 11%

D. 1.2%

72.       A's height is 5/8th of B's height. What is the ratio of B's height to A's height?

A. 5:8

B. 3:8

C. 5:3

D. 8:5

74.       A man travelling by bus finds that the bus crosses 35 electric poles in 1 minutes and the distance between 2 poles is 50 metres. Find the speed of the bus.

A. 112 km/hr

B. 102 km/hr

C. 110 km/hr

D. 120 km/hr

76.       Two-thirds of children are in the agr group 1–12 years. Of this, if three–fourths are in the age group of 1–8 years find the fraction of children in the age group of 9–12 years?

A. 1/3

B. 1/4

C. 1/6

D. 1/2

79.       In a company 10 employees get a salary of Rs. 36,200 each and 15 employees get a salary of Rs. 33,550 each. What is the average salary per employee?

A. 34,875

B. 34,610

C. 27,900

D. 36,410