Question

$( {5}^{61} + {5}^{62} + {5}^{63} ) \\ \: is \: divisible \: by \: \: \\ \\ \\ a)31 \\ b)11 \\ c)13 \\ d)17$
Please solve and show.​

Answer 1

${5}^{61} + 5 {}^{62} + 5 {}^{63} = 5 {}^{61} (1 + 5 + 25) \\ = 5 {}^{61} (31)$

answer

option a) 31

Answer 2

Here's the answer...

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