Question

4. Explain why 7x11×13 + 13 is a composite number​

Answer 1

Answer:

$13(7 \times 11 \times 1 + 1) \\ 13(77 + 1) \\ 13(78) \\ = 1014$

Answer 2

7*11*13+13

= 77*13+13

= 1001+13

= 1024

it is divisible more than 2 numbers so it's composite