Question

Check whether following numbers are prime or composite 7×11×13+13

Answer 1

Explanation:

it is a composite no .

7 × 11 × 13 + 13

= 13 ( 7 ×11 × 1 +1 )

= 13 ( 78 )

= 1014

this shows that it has more than one factor that is 13 and 78. that is why it is known as composite no.

Answer 2

Answer:

composite

Explanation:

7*11*13+13

=13(7*11+1)

so it has a factor 13

so it is composite