How do you determine composite number of 63?

Answer 1

The easiest way to tell if 63 ia a composite number is to determine if 3 will divide evenly into the digits when they are added together.

63

6 + 3 = 9.

9 is divisible by 3.

63 is a composite number.

If you want to know what composite number will divide evenly into 63, you can list the factor pairs:

1 x 63

3 x 21

7 x 9

1, 3, and 7 are prime numbers.

9, 21, and 63 are the factors of 63 that are composite numbers.