To determine if 180 is a prime number or a composite number, we simply look at the factors for 180.
If the factors of 180 are only 180 and 1, then we know that 180 is a prime number. Otherwise, 180 is a composite number.
To explain better, if 180 is only divisible by 1 and 180, then it is a prime number, and if 180 is divisible by more than 180 and 1, then it is a composite number.
The factors of 180 are as follows:
1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180
Therefore, since 180 is divisible by more than one and itself, the answer to the
question "Is 180 prime or composite?" is highlighted in blue below.
composite
Is 181 prime or composite?
OK. Now you know that 180 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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