Prime and Composite

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

What is a composite number?

Back

A composite number is a natural number greater than 1 that has more than two positive divisors.

Front

Is 2 a prime number?

Back

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

Front

Is 1 a prime number?

Back

No, 1 is neither prime nor composite.

Front

How many factors does the number 5 have?

Back

The number 5 has 2 factors: 1 and 5.

Front

How many factors does the number 21 have?

Back

The number 21 has 4 factors: 1, 3, 7, and 21.

Front

How many factors does the number 49 have?

Back

The number 49 has 3 factors: 1, 7, and 49.

Front

How many factors does the number 36 have?

Back

The number 36 has 9 factors: 1, 2, 3, 4, 6, 9, 12, 18, and 36.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

Can a prime number be even?

Back

Yes, the only even prime number is 2.