To determine if 220 is a prime number or a composite number, we simply look at the factors for 220.
If the factors of 220 are only 220 and 1, then we know that 220 is a prime number. Otherwise, 220 is a composite number.
To explain better, if 220 is only divisible by 1 and 220, then it is a prime number, and if 220 is divisible by more than 220 and 1, then it is a composite number.
The factors of 220 are as follows:
1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220
Therefore, since 220 is divisible by more than one and itself, the answer to the
question "Is 220 prime or composite?" is highlighted in blue below.
composite
Is 221 prime or composite?
OK. Now you know that 220 is a composite number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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