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24-08-2016
Mathematics

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A positive integer is subtracted from it's square. The units digit of the result could be which of the following

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24-08-2016

Hello,

If n∈5N ==>0
If n∈5N+1 ==>0
If n∈5N+2 ==>2
If n∈5N+3 ==>6
If n∈5N+4 ==>2

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