Simplification (Railway Maths) (101 to 150)

Total Questions: 50

11. If 25x³ = 1600, then which of the following is a possible value of x? [Group D 26/08/2022 (Morning)]

Correct Answer: (c) 4
Solution:

12. If 5 × 7 − [23 − (35 − (20 − x))] = 42, then find the value of x? [Group D 26/08/2022 (Afternoon)]

Correct Answer: (b) 15
Solution:

13. Which of the following represents the closest approximate value that should come in place of the question mark (?) in the following equation? [Group D 26/08/2022 (Afternoon)]

(√530 + 85 ÷ 24 × 4 − √255) ÷ 3 = ?

Correct Answer: (a) 7
Solution:

14. Find the answer of given question? [Group D 26/08/2022 ( Afternoon ) ]

Correct Answer: (b) 214/495
Solution:

15. If one third of a number is 4 less than the number itself, find the number. [Group D 26/08/2022 (Afternoon) ]

Correct Answer: (c) 6
Solution:

16. Find the answer of given question?

Correct Answer: (d) 3307 / 24975
Solution:

17. What approximate value should come in place of the question mark (?) in the following equation? [ Group D 26/08/2022 (Evening) ]

99.01 ÷ 10.93 + 6.987 × 16.01 = ?

Correct Answer: (c) 121
Solution:

99.01 ÷ 10.93 + 6.987 × 16.01
= 99 ÷ 11 + 7 × 16
= 9 + 112
= 121

18. Find the remainder when 171 × 172 × 173 is divided by 17? [Group D 26/08/2022 (Evening) ]

Correct Answer: (d) 6
Solution:

171 × 172 × 173 ÷ 17 = 1 × 2 × 3 = 6

19. Solve: [Group D 26/08/2022 (Evening)]

3(5x² − 7) − 5(3x² + 2x − 7) = −16

Correct Answer: (c) 3
Solution:

3(5x² − 7) − 5(3x² + 2x − 7) = −16
⇒ 15x² − 21 − 15x² − 10x + 35 = −16
⇒ 10x = 14 + 16
⇒ 10x = 30
⇒ x = 3

20. The value of {(234⁵ − 243⁸ + 1/72)⁻⁸}⁰ + 8 = ? [Group D 29/08/2022 (Morning)]

Correct Answer: (b) 9
Solution: