Simplification (Railway Maths) (151 to 200)

Total Questions: 50

41. If 5ⁿ⁺² = 3125, then n = ______. [Group D 16/09/2022 (Morning)]

Correct Answer: (c) 3
Solution:

42. Find the answer of given equation? [Group D 16/09/2022 (Morning) ]

Correct Answer: (b) 6
Solution:

43. Find the value of [(5/8)⁻⁷ × (8/5)⁻⁴ × (1/4)⁻³]⁻³? [Group D 16/09/2022 (Afternoon)]

Correct Answer: (d) (5/32)⁹
Solution:

44. Simplify (4pq + 3q)² − (4pq − 3q)²? [Group D 16/09/2022 (Afternoon)]

Correct Answer: (d) 48pq²
Solution:

45. Find the value of (1/2)⁻² + (1/3)⁻² + (1/4)⁻²? [Group D 16/09/2022 (Afternoon)]

Correct Answer: (a) 29
Solution:

46. Which of the following options is the closest approximate value which will come in place of the question mark (?) in the following equation? [Group D 16/09/2022 (Afternoon)]

11.96 + 4.96 + 12.16 − 11.89 × 2.04 = ?

Correct Answer: (d) 5
Solution:11.96 + 4.96 + 12.16 − 11.89 × 2.04
= 12 + 5 + 12 − 12 × 2 = 5

47. Convert 23/11 to its recurring decimal form. [Group D 16/09/2022 (Evening) ]

Correct Answer: (b)
Solution:

48. (25/9)ˣ ⁺ ¹ × (81/625)ˣ ⁻ ¹ = 9/25, then find the value of x. [Group D 16/09/2022 (Evening)]

Correct Answer: (d) 4
Solution:

49. The value of 6 − 3 ÷ [9 − 6 ÷ {(6 − 4) ÷ (2 + 8/13)}] is. [Group D 16/09/2022 (Evening)]

Correct Answer: (b) 13/17
Solution:

50. If 5ˣ ⁺ ¹ = 125 and 5ˣ ⁻ ¹ = 3125, then the value of y is: [Group D 17/09/2022 (Morning) ]

Correct Answer: (c) –1
Solution: