To determine if 1205 is a prime number or a composite number, we simply look at the factors for 1205.
If the factors of 1205 are only 1205 and 1, then we know that 1205 is a prime number. Otherwise, 1205 is a composite number.
To explain better, if 1205 is only divisible by 1 and 1205, then it is a prime number, and if 1205 is divisible by more than 1205 and 1, then it is a composite number.
The factors of 1205 are as follows:
1, 5, 241, 1205
Therefore, since 1205 is divisible by more than one and itself, the answer to the
question "Is 1205 prime or composite?" is highlighted in blue below.
composite
Is 1206 prime or composite?
OK. Now you know that 1205 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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