To determine if 550 is a prime number or a composite number, we simply look at the factors for 550.
If the factors of 550 are only 550 and 1, then we know that 550 is a prime number. Otherwise, 550 is a composite number.
To explain better, if 550 is only divisible by 1 and 550, then it is a prime number, and if 550 is divisible by more than 550 and 1, then it is a composite number.
The factors of 550 are as follows:
1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 275, 550
Therefore, since 550 is divisible by more than one and itself, the answer to the
question "Is 550 prime or composite?" is highlighted in blue below.
composite
Is 551 prime or composite?
OK. Now you know that 550 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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