Question

How will you show that [19*13*5] + [19*13*7] is a composite no

Answer 1

Answer:

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Answer 2

Answer:

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Step-by-step explanation:

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.