Number System-Railway Maths Part IX

Total Questions: 50

11. Which of the following fraction falls between 3/4 and 6/7 ? [RRB NTPC 26/07/2021 (Evening)]

Correct Answer: (a) 9/11
Solution:

12. The lowest whole number, which when subtracted from both the terms of the ratio 12 : 17 gives a ratio less than 11/20 , is: [RRB NTPC 26/07/2021 (Evening)]

Correct Answer: (c) 6
Solution:

13. The number of factors of 4200 are: [RRB NTPC 26/07/2021 (Evening)]

Correct Answer: (d) 48
Solution:

14. Which smallest number must be subtracted from 3467860 so that it becomes exactly divisible by 19? [RRB NTPC 31/07/2021 (Morning)]

Correct Answer: (d) 18
Solution:

15. The ratio between two numbers is 3 : 5 and their sum is 80. Find the greater of the two numbers. [RRB NTPC 31/07/2021 (Morning)]

Correct Answer: (d) 50
Solution:

Ratio of the two numbers = 3 : 5

A/Q, 8 units = 80,
5 units = 50

16. The sum of the numbers between 17 and 520 that are divisible by 6 is: [RRB NTPC 31/07/2021 (Evening)]

Correct Answer: (d) 22428
Solution:

17. On dividing 12401 by a certain number, we get 76 as quotient and 13 as remainder. What is the divisor? [RRB NTPC 31/07/2021 (Evening)]

Correct Answer: (c) 163
Solution:

18. The arrangement of rational numbers − 7/10, 5 /− 8, 2/−3 in ascending order is: [RRB NTPC 31/07/2021 (Evening)]

Correct Answer: (a) − 7/10, 2/− 3, 5/−8
Solution:

19. Decimal part of any number is always ______. [RRB JE 22/05/2019 (Afternoon)]

Correct Answer: (d) < 1
Solution:

Decimal number has two parts: the whole part and the decimal part.
Decimal part of the decimal number is always less than 1.

20. What is the remainder when 7² × 9² is divided by 8? [RRB JE 22/05/2019 (Afternoon)]

Correct Answer: (d) 1
Solution: