Simplification (Railway Maths) (501 to 550)

Total Questions: 50

1. Find the answer of given question? [RRB NTPC 16/02/2021 (Morning) ]

Correct Answer: (c)
Solution:

2. Find the answer of given question? [RRB NTPC 16/02/2021 (Evening) ]

Correct Answer: (a)
Solution:

3. Solve the given equation. [RRB NTPC 16/02/2021 (Evening)]

√12321 × √? = 13431

Correct Answer: (c) 14641
Solution:

4. Solve the following. [RRB NTPC 17/02/2021 (Morning)]

8 ÷ 8 × (8 + 8) / (8 ÷ 8 × 8 + 8) = ?

Correct Answer: (d) 1
Solution:

5. If a/b = 0.25, then the value of (2a − b) / (2a + b) + 2/9 is [RRB NTPC 17/02/2021 (Morning)]

Correct Answer: (d) −1/9
Solution:

6. What is the value of 1 − (5/6)² ? [RRB NTPC 17/02/2021 (Evening)]

Correct Answer: (b) 11/36
Solution:

1 - (5/6)² = 1 - 25/36
= 11/36

7. 19 × 19 = 361. What will be the value of 190 × 0.0019? [RRB NTPC 17/02/2021 (Evening)]

Correct Answer: (c) 0.361
Solution:

19 × 19 = 361
Now,
190 × 0.0019
0.361

8. Find the value of x. [RRB NTPC 22/02/2021 (Morning)]

If 52 / x = √(169 / 289)?

Correct Answer: (d) 68
Solution:

52/x = √(169 / 289)
= 52/x = 13/17
⇒ x = 68

9. If x = 1 / (√2 + 1), then what will be the value of x + 1? [RRB NTPC 22/02/2021 (Morning)]

Correct Answer: (c) √2
Solution:

10. Find the answer of given question? [RRB NTPC 22/02/2021 (Morning) ]

Correct Answer: (b) 563/180
Solution: