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Railways PYQCBT 1 2016

RRB NTPC · Question 37

The product of LCM and HCF of two numbers is 48. The difference between two numbers is 8. Find those numbers?

  1. (6, 8)

  2. (12, 4)

  3. (24, 2)

  4. (16, 3)

Show answer & explanation

Answer: (B) (12, 4)

Explanation

LCM × HCF of two numbers equals their product, so the numbers multiply to 48. Of the pairs, only 12 and 4 also differ by 8 (12 × 4 = 48, 12 − 4 = 8). The pair 6 and 8 has the right product but differs by only 2.