Prime Vs. 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 the number 1 prime, composite, or neither?

Back

Neither. The number 1 has only one factor: itself.

Front

What is the divisibility rule for 2?

Back

A number is divisible by 2 if its last digit is even (0, 2, 4, 6, or 8).

Front

What is the divisibility rule for 5?

Back

A number is divisible by 5 if its last digit is 0 or 5.

Front

What is the divisibility rule for 10?

Back

A number is divisible by 10 if its last digit is 0.

Front

Give an example of a prime number.

Back

2, 3, 5, 7, 11 are examples of prime numbers.

Front

Give an example of a composite number.

Back

4, 6, 8, 9, 10 are examples of composite numbers.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the smallest composite number?

Back

The smallest composite number is 4.