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Railways PYQCBT 1 2016

RRB NTPC · Question 5

If three numbers are in the ratio 2 : 3 : 5 and the twice their sum is 100. Find the square of the largest of the three numbers. A. 225 B. 625 C. 25 D. 100

  1. A

  2. C

  3. B

  4. D

Show answer & explanation

Answer: (C) B

Explanation

Let the numbers be 2x, 3x and 5x, with sum 10x. Twice the sum is 20x = 100, so x = 5 and the numbers are 10, 15 and 25. The square of the largest is 25² = 625.