The positive n integer is not divisible by 7 . The remainder when n is divided by 7 and the remainder when n^2 is divided by 7 are each equal to k . What is k? Help with solving a problem like this please!

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Let's try this the old fashioned long division way..

|dw:1328418115277:dw|

|dw:1328418167975:dw|

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