To determine if 355 is a prime number or a composite number, we simply look at the factors for 355.
If the factors of 355 are only 355 and 1, then we know that 355 is a prime number. Otherwise, 355 is a composite number.
To explain better, if 355 is only divisible by 1 and 355, then it is a prime number, and if 355 is divisible by more than 355 and 1, then it is a composite number.
The factors of 355 are as follows:
1, 5, 71, 355
Therefore, since 355 is divisible by more than one and itself, the answer to the
question "Is 355 prime or composite?" is highlighted in blue below.
composite
Is 356 prime or composite?
OK. Now you know that 355 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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