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Railways PYQCBT 1 2016

RRB NTPC · Question 52

Find the greatest number of 4 digits which is completely divided by 12, 20, 32 and 44. A. 5200 B. 4719 C. 6800 D. 5280

  1. A

  2. D

  3. B

  4. C

Show answer & explanation

Answer: (B) D

Explanation

LCM(12, 20, 32, 44) = 2⁵ × 3 × 5 × 11 = 5280. The next multiple, 10560, has 5 digits, so 5280 is the greatest 4-digit number divisible by all four.