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2017-04-17, 11:54   #3
WhoCares

Apr 2017

210 Posts

Quote:
 Originally Posted by Nick No number of the form $$10^n+7$$ is divisible by 11. See, for example, these tests: https://en.wikipedia.org/wiki/Divisibility_rule
I think u get me wrong. I said only n is divisible by 11.