Mastering GCF and LCM for GED Success

What is a factor of a number?

• A number that can be divided by the given number without a remainder

• A number that divides evenly into another number

• A number that is a product of two numbers

• A number that is greater than the given number

Which of the following is NOT a factor of 12?

• 6

• 5

• 4

• 3

What is the first multiple of 12?

• 12

• 24

• 36

• 48

How many factors does the number 12 have?

• 4

• 5

• 7

• 6

What is the greatest common factor (GCF) of 20 and 36?

• 4

• 6

• 2

• 8

What is the least common multiple (LCM) of 20 and 36?

• 180

• 160

• 140

• 120

Which of the following is a prime factor of 36?

• 2

• 4

• 6

• 8

What is the GCF of 20 and 36 using prime factorization?

• 6

• 4

• 2

• 8

What is the LCM of 20 and 36 using prime factorization?

• 140

• 120

• 160

• 180

Using the distributive property, what is 4 times 107?

• 400

• 428

• 448

• 440