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![[Post New]](/templates/default/images/icon_minipost_new.gif) 15 Apr 2008 13:42:34 IST
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5^99 can b written as=(26-1)^49....by binomial expznsion we get=
x=5(26^49-49c1.26^48..........-1)
as divided by 13
x=( )+13
therefore
x=()-5+13
therefore the remainder is -5+13=8
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this reply: 15 points
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