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Railways PYQCBT 1 2020

RRB NTPC · Question 79

When the integer m is divided by 8, the remainder is 5. What is the remainder if 7m is divided by 8?

  1. 5

  2. 4

  3. 3

  4. 6

Show answer & explanation

Answer: (C) 3

Explanation

m = 8k + 5, so 7m = 56k + 35 = 8(7k + 4) + 3. The remainder is 3.