Question

Prove 2?3?5?13?17+13 IS A composite number

Answer 1

if a no. is expressed as product of two no. it is called composite.
in 2?3?5?13?17 has 13 as common no.
so, 2?3?5?13?17+13=
13(2?3?5?17+1)
as it expressed as product of two no. it is composite.