4( power 61 ) + 4( power 62 ) + 4( power 63 ) + 4( power 64 ) is divisible by : A. 17 B. 3 C. 11 D. 13
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the answer is a part that is 17
as if you take 4(power 61) common from all the above terms
4(power 61){1+4+16+64}
that is 85×4(power 61)
as 85 is a multiple of 17
therefore it will be divisible by 17
as if you take 4(power 61) common from all the above terms
4(power 61){1+4+16+64}
that is 85×4(power 61)
as 85 is a multiple of 17
therefore it will be divisible by 17
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