Question

Anyone good with prime numbers factors etc? O:

Answer 1

Which of the following is true?
Choose one answer.
a. fifteen is a prime number because it has a factor of 5.
b. eleven is a composite number because one and eleven are its only factors.
c. 4 is a prime number because it is only divisible by one and itself.
d. 9 is a composite number because it is divisible by 3

Answer 2

Well, a prime number is a number that can only be divided by 1 and itself

Answer 3

So since 15 can be divided by 5, A is not correct.
B also not, because 11 is prime (like B said, 11 can only be divided by 11 and 1)
4 is even and therefore can be divided by 2, so not prime
9 can be divided by 3 so not prime

Answer 4

so d? O: