Question

explain why:1*2*3*5*7+3*7 is a composite number?

Answer 1

Step-by-step explanation:

here the result for the above is -->210+21

-->231

BY the divisibity rules it cannot be divisible by 2.now check for 3 it is divisible...so it has more than 2 divisors so it ia composite number...

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Answer 2

Answer:

1×2×3×5×7+3×7 is a composite number

Let's see how

Step-by-step explanation:

1×2×3×5×7+3×7

=7(1×2×3×5×+3)

=7(30+3)

=7× 33

hence this number has two factors 7 and 33

Therefore, this is a composite number

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