Question

explain 7×6×5×4×3×2×1+5 are composite nos.

Answer 1

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Answer 2

it is because 5 can be taken out from the given group of numbers..

it is like..

5* ( 7*6*1*4*3*2*1+1 )

hence,, as it has 5 as the common factor else than 1

so..it is composite number..