Factors and Multiples

Front

What is a composite number?

Back

A composite number is a positive integer that has at least one positive divisor other than one or itself. For example, 12 is composite because it can be divided by 1, 2, 3, 4, 6, and 12.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. For example, 13 is prime because its only divisors are 1 and 13.

Front

List the factors of 20.

Back

The factors of 20 are 1, 2, 4, 5, 10, and 20.

Front

Is 15 a prime or composite number?

Back

15 is a composite number because it has divisors other than 1 and itself, specifically 3 and 5.

Front

What are the multiples of 4?

Back

The multiples of 4 are 4, 8, 12, 16, 20, and so on.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the greatest common factor (GCF) of 12 and 16?

Back

The GCF of 12 and 16 is 4.

Front

What is the least common multiple (LCM) of 3 and 5?

Back

The LCM of 3 and 5 is 15.

Front

How do you determine if a number is prime?

Back

To determine if a number is prime, check if it has exactly two distinct positive divisors: 1 and itself.

Front

What is a factor?

Back

A factor is a whole number that can be divided evenly into another number. For example, 2 is a factor of 8 because 8 ÷ 2 = 4.