Simplification (Railway Maths) (551 to 600)

Total Questions: 50

11. Find the answer of given question? [RRB NTPC 07/03/2021 (Evening) ]

Correct Answer: (d)
Solution:

12. Find the answer of given question? [RRB NTPC 07/03/2021 (Evening) ]

Correct Answer: (c) 11
Solution:

13. Evaluate : (0.2)³ - (0.02)³? [RRB NTPC 07/03/2021 (Evening) ]

Correct Answer: (c) 0.007992
Solution:

(0.2)³ − (0.02)³
= 0.008 − 0.000008
= 0.007992

14. Answer the following question? [RRB NTPC 07/03/2021 (Evening) ]

Correct Answer: (d) 17/7
Solution:

15. Solve the following. [RRB NTPC 08/03/2021 (Morning) ]

(28.4)² - (24.4)² / (28.4 - 24.4) = ?

Correct Answer: (c) 52.8
Solution:

(28.4)² - (24.4)² / (28.4 - 24.4)
= 28.4 + 24.4
52.8

16. Find the positive value of [RRB NTPC 08/03/2021 (Morning) ]

Correct Answer: (d) 4
Solution:

Here we can write 12 into two consecutive factors 3, 4 ; i.e.
12 = 3 × 4 ;
And as the sign is +ve, so we will take the larger factor = 4 ;
So the value of

17. Solve the following. [RRB NTPC 08/03/2021 (Morning)]

(7 / 77) × 7777077 = ?

Correct Answer: (b) 707007
Solution:

7/77 × 7777077 = 101001 × 7 = 707007

18. The product of 0.27 and 3.54 is less than 5.743 by how much? [RRB NTPC 08/03/2021 (Morning)]

Correct Answer: (d) 4.7872
Solution:

The product of 0.27 and 3.54 = 0.9558 ;
Then the product of 0.27 and 3.54 is less than 5.743 by 4.7872.

19. If √(5ⁿ) = 625, then the value of n is: [RRB NTPC 08/03/2021 (Evening)]

Correct Answer: (c) 8
Solution:

20. Answer the following question? [RRB NTPC 08/03/2021 (Evening)]

Correct Answer: (b) 23
Solution: