To determine if 408 is a prime number or a composite number, we simply look at the factors for 408.
If the factors of 408 are only 408 and 1, then we know that 408 is a prime number. Otherwise, 408 is a composite number.
To explain better, if 408 is only divisible by 1 and 408, then it is a prime number, and if 408 is divisible by more than 408 and 1, then it is a composite number.
The factors of 408 are as follows:
1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 102, 136, 204, 408
Therefore, since 408 is divisible by more than one and itself, the answer to the
question "Is 408 prime or composite?" is highlighted in blue below.
composite
Is 409 prime or composite?
OK. Now you know that 408 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.
|
|
