Question

Test the divisibility of the following number by 11:

901351

Answer 1

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

901351 is divisible by 11.
Sum of the digits at odd places = (0 + 3 + 1) = 4
 Sum of the digits at even places = (9 + 1 + 5) = 15
 Difference of the two sums = (4 − 15) = −11, which is divisible by 11.