To determine if 505 is a prime number or a composite number, we simply look at the factors for 505.
If the factors of 505 are only 505 and 1, then we know that 505 is a prime number. Otherwise, 505 is a composite number.
To explain better, if 505 is only divisible by 1 and 505, then it is a prime number, and if 505 is divisible by more than 505 and 1, then it is a composite number.
The factors of 505 are as follows:
1, 5, 101, 505
Therefore, since 505 is divisible by more than one and itself, the answer to the
question "Is 505 prime or composite?" is highlighted in blue below.
composite
Is 506 prime or composite?
OK. Now you know that 505 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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