To determine if 169 is a prime number or a composite number, we simply look at the factors for 169.
If the factors of 169 are only 169 and 1, then we know that 169 is a prime number. Otherwise, 169 is a composite number.
To explain better, if 169 is only divisible by 1 and 169, then it is a prime number, and if 169 is divisible by more than 169 and 1, then it is a composite number.
The factors of 169 are as follows:
1, 13, 169
Therefore, since 169 is divisible by more than one and itself, the answer to the
question "Is 169 prime or composite?" is highlighted in blue below.
composite
Is 170 prime or composite?
OK. Now you know that 169 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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