To determine if 357 is a prime number or a composite number, we simply look at the factors for 357.
If the factors of 357 are only 357 and 1, then we know that 357 is a prime number. Otherwise, 357 is a composite number.
To explain better, if 357 is only divisible by 1 and 357, then it is a prime number, and if 357 is divisible by more than 357 and 1, then it is a composite number.
The factors of 357 are as follows:
1, 3, 7, 17, 21, 51, 119, 357
Therefore, since 357 is divisible by more than one and itself, the answer to the
question "Is 357 prime or composite?" is highlighted in blue below.
composite
Is 358 prime or composite?
OK. Now you know that 357 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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