test the divisibility of the following number like 83721
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Aug 12, 2020 - If the difference of the sum of its digits at odd places and sum of its digits at even places is either 0 or multiple of 11 then the given number is ...
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If the difference of the sum of its digits at odd places and sum of its digits at even places is either 0 or multiple of 11 then the given number is divisible by 11
83721
Sum of the digits at odd places =1+7+8=16
Sum of the digits at even places =2+3=5
Difference of the two sums =16−5=11
∴83721 is divisible by 11
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