Factors, Multiples, Divisibility Rules

Front

What is a factor?

Back

A factor is a number that divides another number without leaving a remainder.

Front

What is a multiple?

Back

A multiple is a number that can be divided by another number without a remainder.

Front

What does it mean if a number is prime?

Back

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

Front

What does it mean if a number is composite?

Back

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

Front

How can you tell if a number is divisible by 2?

Back

A number is divisible by 2 if it has an even number as the last digit.

Front

How can you tell if a number is divisible by 3?

Back

A number is divisible by 3 if the sum of its digits is divisible by 3.

Front

How can you tell if a number is divisible by 5?

Back

A number is divisible by 5 if it ends in 0 or 5.

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two numbers is the smallest number that is a multiple of both.

Front

What is the greatest common factor (GCF)?

Back

The greatest common factor (GCF) of two numbers is the largest number that divides both of them without a remainder.

Front

What are the first five multiples of 7?

Back

The first five multiples of 7 are 7, 14, 21, 28, and 35.