Wednesday, 13 January 2016

modular arithmetic - Prove that 5353333 is divisible by 10

Prove that 5353333 is divisible by 10



I don't know modular arithmetic, so I tried things like that:



5335350333=(33+20)35350333=(33+20)(33+20)(33+20)5350333
but I get stuck and don't know how to continue

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