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Railways PYQCBT 1 2016

RRB NTPC · Question 4

The HCF of two numbers is 4 and the two other factors of LCM are 5 and 7. Find the smaller of the two numbers. A. 10 B. 14 C. 20 D. 28

  1. C

  2. B

  3. D

  4. A

Show answer & explanation

Answer: (A) C

Explanation

With HCF 4 and the other factors of the LCM being 5 and 7, the numbers are 4 × 5 = 20 and 4 × 7 = 28 (LCM = 4 × 5 × 7 = 140). The smaller number is 20.