11 Because it can only be divided by itself and 1
Chat with our AI personalities
Even composite numbers can, odd composite numbers can't.
The composite numbers in that list are 22 and 36 - you know they are composite, because they are even numbers. The other numbers are odd and prime.
No - although all positive even numbers other than 2 are composite, this does not mean that all composite numbers are even - the first odd composite number is 9, which is equal to 3 x 3.
A composite number is a number that can be divided in a way other than itself and by 1. Other than 2, all even numbers are composite, so if you include 10 and 82 the answer would be 39 composite numbers. Without 10 and 82, the answer would be 37 composite numbers.
38 is a composite number because composite numbers are numbers that have more than 1 and themselves as factors. 1x38 is not the only solution, so it isn't prime. One solution for this could be 2x19