Question

...........................................

Answer 1

=7×11×13+13=77×13+13=1001+13=1014=2×3×13×13
it can written in prime factorization
so it is composite number

Answer 2

Answer to 3rd question :

7 x 11 x 13 + 13

13 ( 7 x 11 + 1 )

13 ( 78 ) = 1014

We know that a prime number cannot be expressed as a product of two numbers except 1 and the number itself.(eg. 5 = 5 x 1 , where 5 is a prime no.)

But 1014 can be expressed as product of 78 and 13.

Hence, 7 x 11 x 13 + 13 is a composite number.

Hope this helps..!

Plz don’t forget to mark me as the brainliest answer....!