Simplification (Railway Maths) (351 to 400)

Total Questions: 50

21. Find the answer of given equation? [RRB NTPC 04/01/2021 (Evening)]

Correct Answer: (a) 1
Solution:

22. Find the answer of given question? [RRB NTPC 05/01/2021 (Morning) ]

Correct Answer: (d) 30/37
Solution:

23. The value of √(36.1 / 102.4) is [RRB NTPC 05/01/2021 (Morning)]

Correct Answer: (b) 19/32
Solution:

24. Find the value of 0.4 + 404/1000. [RRB NTPC 05/01/2021 (Evening)]

Correct Answer: (c) 0.804
Solution:

25. Find the value of [{(2)²}²]² [RRB NTPC 05/01/2021 (Evening)]

Correct Answer: (c) 2⁸
Solution:

[{(2)²}²]² = 2⁸

26. Find the answer of given question? [RRB NTPC 05/01/2021 (Evening) ]

Correct Answer: (d) 0.454545….
Solution:

27. The denominator of a fraction is 2 more than the numerator. When the numerator is multiplied by 3 and the denominator is multiplied by 2 the fraction becomes 1/2. The given fraction is [RRB NTPC 07/01/2021 (Morning)]

Correct Answer: (b) 1/3
Solution:

Let the fraction is x/y, The denominator of the fraction is 2 more than the numerator ⇒ y = x + 2 When the numerator is multiplied by 3 and the denominator is multiplied by 2, the fraction becomes 1/2,
3x / 2 × (x + 2) = 1/2 ⇒ x = 1

28. Simplify the following: [RRB NTPC 07/01/2021 (Morning)]

2.2 × 0.2 ÷ (0.4 × 1/2) − 1/2 × 4 (1.04 − 0.2 × 0.2)

Correct Answer: (c) 0.2
Solution:

29. Select the number that can replace the question mark (?) in the following equation. [RRB NTPC 07/01/2021 (Evening)]

12 + 8 − 5 × 1/2 × 12 − {45 ÷ (34 − 19)} = ?

Correct Answer: (c) −13
Solution:

30. The fractions 1/3, 4/7, 2/5 written in ascending order are: [RRB NTPC 07/01/2021 (Evening)]

Correct Answer: (c) 1/3, 2/5, 4/7
Solution:

Ascending order = 1/3, 2/5, 4/7