To determine if 153 is a prime number or a composite number, we simply look at the factors for 153.
If the factors of 153 are only 153 and 1, then we know that 153 is a prime number. Otherwise, 153 is a composite number.
To explain better, if 153 is only divisible by 1 and 153, then it is a prime number, and if 153 is divisible by more than 153 and 1, then it is a composite number.
The factors of 153 are as follows:
1, 3, 9, 17, 51, 153
Therefore, since 153 is divisible by more than one and itself, the answer to the
question "Is 153 prime or composite?" is highlighted in blue below.
composite
Is 154 prime or composite?
OK. Now you know that 153 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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