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Railways PYQCBT 1 2020

RRB NTPC · Question 29

The ratio of two positive numbers is 3 : 7 and their LCM is 231. The smaller number is:

  1. 55

  2. 33

  3. 44

  4. 77

Show answer & explanation

Answer: (B) 33

Explanation

The numbers are 3k and 7k with LCM 21k = 231, so k = 11. The smaller number is 33.