Question

Explain why 4x11x13+13
and
7x6*5 X 4x2x1+5 are
composite numbers​

Answer 1

Answer:

The numbers which are not prime and numbers having factors other than one and itself are known as composite numbers. So factors are 13 x 13 x 3 x 2 which has the value equal to 1014 and has more than one factor. So it is a composite number. We get 1009 x 5 = 5045 which is a composite number

Answer 2

Answer:

Given 7×11×13+13

=13×(7×11+1)=3×78  

This number is multiple of two integers.Hence it has more than two factors.Hence it is a composite number.

similarly in

7×6×5×4×3 ×2×1+5    

=5(7×6×4×3 ×2×1+1)=5×1009    

This number is multiple of two integers.Hence it has more than two factors.Hence it is a composite number.

Step-by-step explanation: