To determine if 1224 is a prime number or a composite number, we simply look at the factors for 1224.
If the factors of 1224 are only 1224 and 1, then we know that 1224 is a prime number. Otherwise, 1224 is a composite number.
To explain better, if 1224 is only divisible by 1 and 1224, then it is a prime number, and if 1224 is divisible by more than 1224 and 1, then it is a composite number.
The factors of 1224 are as follows:
1, 2, 3, 4, 6, 8, 9, 12, 17, 18, 24, 34, 36, 51, 68, 72, 102, 136, 153, 204, 306, 408, 612, 1224
Therefore, since 1224 is divisible by more than one and itself, the answer to the
question "Is 1224 prime or composite?" is highlighted in blue below.
composite
Is 1225 prime or composite?
OK. Now you know that 1224 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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