Prime and Composite Numbers

Prime numbers are numbers whose only factors are one and itself.

A composite number is a positive integer that has at least one positive divisor other than one or itself.

21 is a composite number.

No, not all even numbers are composite. For example, 2 is an even prime number.

The smallest prime number is 2.

The largest prime number less than 10 is 7.

Yes, the only even prime number is 2.

Prime numbers have exactly two distinct positive divisors (1 and the number itself), while composite numbers have more than two positive divisors.

No, 1 is not considered a prime number.

A factor is a number that divides another number without leaving a remainder.