LCM and GCF

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two or more numbers is the smallest multiple that is exactly divisible by each of the numbers.

Front

What is the greatest common factor (GCF)?

Back

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

Front

Find the LCM of 5 and 20.

Back

20

Front

Find the LCM of 8 and 12.

Back

24

Front

Find the LCM of 4, 5, and 6.

Back

60

Front

What are multiples of 3?

Back

Multiples of 3 include: 3, 6, 9, 12, 15, 18, etc.

Front

List the factors of 12.

Back

Factors of 12 include: 1, 2, 3, 4, 6, 12.

Front

How do you find the LCM using prime factorization?

Back

1. Factor each number into primes. 2. Take the highest power of each prime. 3. Multiply these together.

Front

How do you find the GCF using prime factorization?

Back

1. Factor each number into primes. 2. Take the lowest power of each common prime. 3. Multiply these together.

Front

What is a multiple?

Back

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