Question

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

Answer 1

hence we can say that it is a composite number

Answer 2

Answer:

(3× 5×7)+(7)

= 7(3×5×1+1)          {taking 7 common term)

=7(15+1)

=7×16=112

here 7×16 which is 112 is a composite number because it has atleast two factors 7 and 16 other than 1 and the number itself

hence 112 or 3× 5 × 7+7 is a composite number.​