Question

Explain why 3 × 5 × 7 + 7 is a composite number.

Answer 1

@genius12

Answer 2

because it has a factor of 7

Answer 3

But how it has the factor, Sir please show.

Answer 4

\(3\times 5\times 7+7=(3\times 5+1)\times 7\) by the distributive law

Answer 5

of course you could always compute the number and see that it is composite

Answer 6

OMG! i got it now :)

how foolish I was, didn't use or thought about distributive law

Answer 7

Anyways, Thank you

Answer 8

yw