Question

Explain why 7*6*3*5+5 is not a composite number

Answer 1

     7*6*3*5 + 5
=> 5( 7*6*3) +1
=> 5*126+1
=> 630+1
=> 631 
        which is a prime number.

 So, 7*6*5+5 is not a composite number.

Answer 2

Answer:

Step-by-step explanation:

7×6×3×5+5

Can also be written as

5 (7×6×3)+1 taking 5 common

5×126+1

630+1

631

As it is a prime no. Which it has no common factor.

So,7×6×5+5 is not a composite number.