Question

Explain why 3 x 5 x 7 x 11 x 13+ 5 x 13 is a composite number.​

Answer 1

3 * 5 * 7 * 11 * 13 + 5 * 13

taking 13 as common

13 ( 3 * 5* 7 * 11 * 1 + 5 * 1 )

13 ( 3 * 5 * 7 * 11 + 5 )

13 ( 1160 )

13 ( 2 * 2 * 2 * 5 * 29 )

henxe it is composite