To determine if 154 is a prime number or a composite number, we simply look at the factors for 154.
If the factors of 154 are only 154 and 1, then we know that 154 is a prime number. Otherwise, 154 is a composite number.
To explain better, if 154 is only divisible by 1 and 154, then it is a prime number, and if 154 is divisible by more than 154 and 1, then it is a composite number.
The factors of 154 are as follows:
1, 2, 7, 11, 14, 22, 77, 154
Therefore, since 154 is divisible by more than one and itself, the answer to the
question "Is 154 prime or composite?" is highlighted in blue below.
composite
Is 155 prime or composite?
OK. Now you know that 154 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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