perplexus.info :: Just Math : Identical Digit Determination

Identical Digit Determination (Posted on 2014-11-13)

I am thinking of a 100-digit number divisible by 21649, of which, all the digits are identical, except the units digit. What is the units digit?

No Solution Yet Submitted by K Sengupta

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answer- from my smatphone

Comment 1 of 1

The last digit is zero.

The other digits- any non-zero digit will do.

WHY?

21649 divides 11111111111 (eleven ones).

Posted by Ady TZIDON on 2014-11-13 08:01:12

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