Question

explain y (3×5×7)+7 is a composite number ​

Answer 1

Taking 7common from it

7(3×5)+1

7×16

7×2×2×2×2

by fundamental theorem of arithmetic its composite

Answer 2

Hey!

7(3×5×1+1)

This is a composite number because this number has more than two factors.

And we know, a number having more than two factors is a composite number.

Hope this helps ✌✌