To determine if 1550 is a prime number or a composite number, we simply look at the factors for 1550.
If the factors of 1550 are only 1550 and 1, then we know that 1550 is a prime number. Otherwise, 1550 is a composite number.
To explain better, if 1550 is only divisible by 1 and 1550, then it is a prime number, and if 1550 is divisible by more than 1550 and 1, then it is a composite number.
The factors of 1550 are as follows:
1, 2, 5, 10, 25, 31, 50, 62, 155, 310, 775, 1550
Therefore, since 1550 is divisible by more than one and itself, the answer to the
question "Is 1550 prime or composite?" is highlighted in blue below.
composite
Is 1551 prime or composite?
OK. Now you know that 1550 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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