To determine if 135 is a prime number or a composite number, we simply look at the factors for 135.
If the factors of 135 are only 135 and 1, then we know that 135 is a prime number. Otherwise, 135 is a composite number.
To explain better, if 135 is only divisible by 1 and 135, then it is a prime number, and if 135 is divisible by more than 135 and 1, then it is a composite number.
The factors of 135 are as follows:
1, 3, 5, 9, 15, 27, 45, 135
Therefore, since 135 is divisible by more than one and itself, the answer to the
question "Is 135 prime or composite?" is highlighted in blue below.
composite
Is 136 prime or composite?
OK. Now you know that 135 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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