Question

explain why 3 into 5 into 7 into 3 + 3 is a composite number

Answer 1

3×5×7×9 = 945.

It is so because 945 is divisible by 5 .

Answer 2

3x5x7x3+3=318
It is a composite number because it divisible more than 1 and the number itself. The number which is divisible only by 1 and the number itself is called prime number.