Prime and composite

Front

What is a prime number?

Back

A prime number is a number greater than 1 that has exactly two factors: 1 and itself.

Front

What is a composite number?

Back

A composite number is a number greater than 1 that has more than two factors.

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

What are the factors of 6?

Back

The factors of 6 are 1, 2, 3, and 6.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the largest single-digit prime number?

Back

The largest single-digit prime number is 7.

Front

What is a multiple of 5? Give an example.

Back

A multiple of 5 is any number that can be divided by 5 without a remainder. Example: 15.

Front

How many factors does the number 10 have?

Back

The number 10 has four factors: 1, 2, 5, and 10.

Front

Is 21 a prime number?

Back

No, 21 is a composite number because it has four factors: 1, 3, 7, and 21.