Question

Explain why 7x11x13-13 is a composite number

Answer 1

• Composite Numbers are those numbers that have more than two factors . For example , 6 is a composite number with factors [ 1, 2, 3 and 6 itself ]

→Given Number :

7 × 11 × 13 - 13

= 13 ( 7 × 11 - 1 )

= 13 ( 77 - 1 )

= 13 ( 76)

•°• The number is composite as it has more than two factors!

Answer 2

$7*11*13-13 = 13(77-1) = 13*76$

Since 13x76 is a composite number ( as it has factors other that 1 and itself)

It 7x11x13-13 is a composite number

HOPE THIS HELPS!!