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Railways PYQCBT 1 2016

RRB NTPC · Question 76

Which of these numbers is divisible by 11? A. 45336787 B. 44469542 C. 49231754 D. 56433257

  1. D

  2. A

  3. C

  4. B

Show answer & explanation

Answer: (C) C

Explanation

A number is divisible by 11 if the difference between the sums of alternate digits is a multiple of 11. For 49231754: (4 + 2 + 1 + 5) − (9 + 3 + 7 + 4) = 12 − 23 = −11, so it is divisible by 11.