Question

Explain why 7✖️11✖️13+13and 7✖️6✖️5✖️4✖️2✖️1+5 are composite numbers

Answer 1

HERE IS YOUR ANSWER

Numbers are two types prime and composite numbers. Prime numbers can be divided by 1 and by itself, Where are composite numbers have factors other than one and itself.

It can be observed that :

7 × 11 ×13 + 13

= 13 { 7× 11+ 1 }

= 13× { 77 + 1 }

= 13 × 78

= 13×13×6

The given expression as 6 and 13 as it's factors, therefore it is a composite number.

2. 7 × 6 × 5 × 4 × 3 × 2 × 1+ 5

= 5 { 7× 6×1×4×3×2×1+1 }

= 5×{ 1008+1}

= 5× 1009

1009 cannot be factorised further. Therefore, the given expression as 5 and

1009 as it's factors. Hence, it is a composition number.

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