Question

Explain 7 x 6 5 x 4 x 3 x 2 x 1 + 5 is composite numbers.

Answer 1

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Answer 2

7×6×5×4×3×2×1+5

= 5 (7×6×4×3×2×1+1)

= 5(1008+1)

= 5(1009)

It has more than two factors. So,it is a composite number.