Discussion

Which of the following numbers is divisible by 11?

Answer: D

A number is divisible by 11 if the difference between the sum of digits at odd places and the sum of digits at even places is 0 or a multiple of 11.

A) (1+6+3) - (4+5+2) = 10 - 11 = -1

B) (2+6+4) - (4+5+2) = 12 - 11 = 1

C) (4+6+1) - (2+5+3) = 11 - 10 = 1

D) (4+6+1) - (2+5+4) = 11 - 11 = 0. Since the difference is 0, 415624 is divisible by 11.

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