Question

explain 5*7*11*13-13 is a composite number​

Answer 1

Hey mate here is your answer........

5*7*11*13-13

13(5*7*11-1)

13(385-1)

13*384

13*384*1

As it have more than 2 factors, so it is a composite number.

HOPE IT HELPS YOU ...........^_^