Question

Give reason that 13x17x19x23+13x23 is composite number

Answer 1

First ,
We will check the result
13×17×19×23+13×23
221×437+299
96577+299
96876
Let's do factorisation
96876 = 2×2×3×3×3×3×13×23
It is divisible by numbers other than 1 and the number itself.
So, it is a composite number

Answer 2

Answer:

Step-by-step explanation:

13*17*19*23+13*23=

13(17*19*23+23)

13*1* (17*19*23+23)

As there are more than 3 factor.

Thus, it is a composite no.