Prime and Composite Numbers

Front

What are prime numbers?

Back

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

Front

What is a composite number?

Back

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

Front

Is the number 21 a prime or composite number?

Back

21 is a composite number.

Front

Are all even numbers composite numbers?

Back

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

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the largest prime number less than 10?

Back

The largest prime number less than 10 is 7.

Front

Can a prime number be even? If so, which one?

Back

Yes, the only even prime number is 2.

Front

What is the difference between prime and composite numbers?

Back

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

Front

Is the number 1 a prime number?

Back

No, 1 is not considered a prime number.

Front

What is a factor?

Back

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