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Dear sundeep
to know digit at unit place we do not need whole number
just take the digit at unit place ie 3
digit at unit place
3^1 = 3
3^2 = 9
3^3 = 7
3^4= 1
3^5= 3
digit at unit place is periodic of period 4
digit at unit place for 23)^14 =is same as digit at unit place for 3^2
that is 9
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