Factors and Multiples

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

List the prime numbers less than 20.

Back

2, 3, 5, 7, 11, 13, 17, 19.

Front

What are factors?

Back

Factors are numbers that can be multiplied together to get another number.

Front

What are the factors of 42?

Back

1, 2, 3, 6, 7, 14, 21, 42.

Front

What is a multiple?

Back

A multiple of a number is the product of that number and an integer.

Front

List the first five multiples of 4.

Back

4, 8, 12, 16, 20.

Front

What is the difference between prime and composite numbers?

Back

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

Front

Is 15 a prime or composite number?

Back

Composite.

Front

What are the factors of 20?

Back

1, 2, 4, 5, 10, 20.

Front

What is the smallest prime number?

Back

2.