Simplification (Railway Maths) (501 to 550)

Total Questions: 50

41. The square root of 182.25 is: [RRB NTPC 04/03/2021 (Morning)]

Correct Answer: (a) 13.5
Solution:

√182 . 25 = 13.5

42. The value of [(56 + 34)² − (56 − 34)²] / (4 × 56 × 34) is: [RRB NTPC 04/03/2021 (Morning)]

Correct Answer: (b) 1
Solution:

43. Find the value of (119.5²− 116.4²) / (119.5 − 116.4). [RRB NTPC 04/03/2021 (Evening)]

Correct Answer: (d) 235.9
Solution:

44. Find the value of (22 + 8√6)¹/². [RRB NTPC 04/03/2021 (Evening)]

Correct Answer: (d) 4 + √6
Solution:

45. By how much is 2/3 of 3000 more than 2/5 of 1500? [RRB NTPC 04/03/2021 (Evening)]

Correct Answer: (b) 1400
Solution:

Difference between (2/3 of 3000) and (2/5 of 1500)
= 2000 - 600 = 1400

46. If √625 ÷ √x = 1/5, then x = ? [RRB NTPC 04/03/2021 (Evening)]

Correct Answer: (b) 15625
Solution:

√625 ÷ √x = 1/5
25 ÷ √x = 1/5 =√x = 125 ⇒ x = 15625

47. Find the answer of given question? [RRB NTPC 04/03/2021 (Evening)]

Correct Answer: (a) 25
Solution:

√(484√25 ÷ x) = 22
⇒ 484√25 ÷ x = 484
⇒ √25 ÷ x = 1
⇒ 25 ÷ x = 1
⇒ x = 25

48. The value of √142884 is: [RRB NTPC 05/03/2021 (Morning)]

Correct Answer: (b) 378
Solution:

√142884 = √(35721 × 2 × 2)
= √(378 × 378)
= 378

49. Solve the given equation. [RRB NTPC 05/03/2021 (Morning)]

√((544)² − (256)²)

Correct Answer: (c) 480
Solution:

50. Convert 8/9 into a decimal number. [RRB NTPC 05/03/2021 (Evening)]

Correct Answer: (b) 0.88
Solution:

8/9 = 0.88