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Asked by medlin

what is the unit digit in (7^95 - 3^58) ?
10 years ago

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Answered by Steve
powers of 7 end in 7,9,3,1,...
so, 7^95 = 7^92 * 7^3 -- it ends in 3

do a similar thing for powers of 3.

then do the subtraction.
10 years ago
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what is the unit digit in (7^95 - 3^58) ?

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