Prime and Composite

Front

What is a prime number?

Back

A prime number is a number that has exactly two distinct positive factors: 1 and itself.

Front

What is a composite number?

Back

A composite number is a number that has more than two distinct positive factors.

Front

Is 1 a prime number?

Back

No, 1 is neither prime nor composite because it has only one factor.

Front

What are the first five prime numbers?

Back

The first five prime numbers are 2, 3, 5, 7, and 11.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the largest prime number less than 20?

Back

The largest prime number less than 20 is 19.

Front

Is 2 a prime number?

Back

Yes, 2 is a prime number because it has exactly two factors: 1 and 2.

Front

Is 4 a prime number?

Back

No, 4 is a composite number because it has three factors: 1, 2, and 4.

Front

How can you determine if a number is prime?

Back

To determine if a number is prime, check if it has only two factors: 1 and itself.

Front

What is a factor?

Back

A factor is a whole number that can be divided evenly into another number.