Question

Prove that the following number is composite one 7×6×5×4 ×3 ×2×1 + 7

Answer 1

$Given \: 7\times 6 \times 5\times 4 \times 3\times 2 \times 1 + 7 \\= 7 ( 6 \times 5\times 4 \times 3\times 2 \times 1 + 1) \\ = 7 ( 720+ 1)\\= 7 \times 721 \times 1 \\\blue { ( More \: than \: two \: factors )} \\= \pink { ( Composite \: numbers ) }$

Therefore.,

$\red {7\times 6 \times 5\times 4 \times 3\times 2 \times 1 + 7\: } \\\green { \:is \:a\: Composite \: numbers }$

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Answer 2

Step-by-step explanation:

check the file attached.