It must have more than two factors.
It must have at least one more factor in addition to '1' and itself.
Your options C and D are the same, but it is true that 51 is a composite number.
It's an even number so it MUST be composite!
True
No, composite numbers must be positive integers.
No. It IS true that every whole number is either prime or composite. But there are numbers that are not whole numbers, such as 2.5, which are neither prime nor composite.
True(Prime factorization is to write a composite number as a product of its prime factors).
It's even. It must be composite.
The statement is simply not true! For example, 6 is composite.
There must be more than 2 factors for a number to be composite.
If you mean factors then it is true because a composite number has more than two factors.
35, 55, 77, 385 must be.