To determine if 305 is a prime number or a composite number, we simply look at the factors for 305.
If the factors of 305 are only 305 and 1, then we know that 305 is a prime number. Otherwise, 305 is a composite number.
To explain better, if 305 is only divisible by 1 and 305, then it is a prime number, and if 305 is divisible by more than 305 and 1, then it is a composite number.
The factors of 305 are as follows:
1, 5, 61, 305
Therefore, since 305 is divisible by more than one and itself, the answer to the
question "Is 305 prime or composite?" is highlighted in blue below.
composite
Is 306 prime or composite?
OK. Now you know that 305 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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