To determine if 245 is a prime number or a composite number, we simply look at the factors for 245.
If the factors of 245 are only 245 and 1, then we know that 245 is a prime number. Otherwise, 245 is a composite number.
To explain better, if 245 is only divisible by 1 and 245, then it is a prime number, and if 245 is divisible by more than 245 and 1, then it is a composite number.
The factors of 245 are as follows:
1, 5, 7, 35, 49, 245
Therefore, since 245 is divisible by more than one and itself, the answer to the
question "Is 245 prime or composite?" is highlighted in blue below.
composite
Is 246 prime or composite?
OK. Now you know that 245 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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