To determine if 209 is a prime number or a composite number, we simply look at the factors for 209.
If the factors of 209 are only 209 and 1, then we know that 209 is a prime number. Otherwise, 209 is a composite number.
To explain better, if 209 is only divisible by 1 and 209, then it is a prime number, and if 209 is divisible by more than 209 and 1, then it is a composite number.
The factors of 209 are as follows:
1, 11, 19, 209
Therefore, since 209 is divisible by more than one and itself, the answer to the
question "Is 209 prime or composite?" is highlighted in blue below.
composite
Is 210 prime or composite?
OK. Now you know that 209 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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