Question

7 into 3 into 2 into 5 is composite number justify your answer with another example

Answer 1

7*3*2*5
=21*10
=210
210 is a composite number because it can be divided by 21,3,71,210 etc and lot more
So it is composite

Answer 2

yes,it would be a composite no. since the product 7*5*3*2is divisible by 3 so the number 7*5*3*2+3 will be also divisible by hence it would be a composite number . if you divide 7*5*3*2 by 3 the answer will be 7*5*2 now considere multiplication 3(7*5*2*1)the answer will be 7*5*3*2+3 hence this number has factors other than one.
in the other words you can take 3 common from the given expression 7*5*3*2+3 and write it in form :-
3(7*5*2+1) which proves that fact that 7*5*3*2+3 is a composite number.
let
a= 7*5*2
=7*5*3*2+3=3a+3
=3(a+1)
yes it would be a composite number, since it is divisible by 3