Question

Explain why 7*9*13*15+15*14 is a composite no.... ( * means multiply ) explain fast

Answer 1

Composite number are the numbers which have factors other than 1 and the number itself.

Given number,
7×9×13×15+15×14
15(7×9×13+14)

Since this number have factors other than 1 and the number itself, it is a composite number.

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Answer 2

as 15 is common in both factors a number having factor other than 1& itself are called composite numbers so it is a composite number