Question

If(3×4×5×7)+(19×21×23) a composite number justify​

Answer 1

Read:

A composite number have factors accept itself and 1.

(3×4×5×7)+(19×21×23) = 9597 .

9597 have factors other than 1 and itself

Answer 2

Composite numbers are those numbers that can be formed by the product of the two smaller number.

e. g. -21=3*7

In the given question you have written the multiplication form which is also the composite no. of the big no.

As, 3*4*5*7 is a composite no. of 735.

Similarly the other one is also a composite no.