Simplification (Railway Maths) (551 to 600)

Total Questions: 50

1. Find the answer of given question? [RRB NTPC 05/03/2021 (Evening) ]

Correct Answer: (a) 0.2
Solution:

2. If √7 = 2.6, then the value of (5√7) / (4√7 − 0.4) is: [RRB NTPC 05/03/2021 (Evening)]

Correct Answer: (d) 1.3
Solution:

3. Which of the following fractions are in ascending order? [RRB NTPC 05/03/2021 (Evening)]

Correct Answer: (b) 12/18, 14/17, 16/19
Solution:

ascending order = 12/18, 14/17, 16/19

4. Given that a = √4, then the value of the following: [RRB NTPC 05/03/2021 (Evening)]

√9 + 25a + √64

Correct Answer: (d) 61
Solution:

√9 + 25a + √64
= 3 + 25√4 + 8
= 3 + 50 + 8
= 61

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

Correct Answer: (a) 11/9
Solution:

6. If √5ⁿ = 5, then n = ? [RRB NTPC 07/03/2021 (Morning)]

Correct Answer: (c) 2
Solution:

√5ⁿ = 5
Squaring both sides, we get 5ⁿ = 5²
On comparing we get, n = 2

7. Find the value of 18 − [6 ÷ 3 × {8 − (10 × 1/2)}]. [RRB NTPC 07/03/2021 (Morning)]

Correct Answer: (b) 12
Solution:

8. √176 + √2401 is equal to: [RRB NTPC 07/03/2021 (Morning)]

Correct Answer: (d) 15
Solution:

9. Simplify: 0.077 ÷ 7 − 0.005 ÷ 5 [RRB NTPC 07/03/2021 (Morning)]

Correct Answer: (a) 0.01
Solution:

0.077 ÷ 7 - 0.005 ÷ 5
= 0.011 - 0.0001 = 0.01

10. The value of the variable x in the equation 3(5x + 2) − 4 = 2(1 − 4x) is: [RRB NTPC 07/03/2021 (Evening)]

Correct Answer: (d) 0
Solution:

The value of the variable x in the equation 3 (5x + 2) - 4 = 2 (1 - 4x) is:
⇒ 23x = 0 ⇒ x = 0 ;