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Railways PYQCBT 1 2020

RRB NTPC · Question 55

The product of three numbers is 10290 and the numbers are in the ratio of 3 : 5 : 2 The greatest number among the three numbers is:

  1. 75

  2. 60

  3. 21

  4. 35

Show answer & explanation

Answer: (D) 35

Explanation

Let the numbers be 3k, 5k and 2k. Product = 30k³ = 10290, so k³ = 343 and k = 7. The greatest number = 5 × 7 = 35.