Greatest Common Factor (GCF) & Least Common Multiple (LCM)

The Greatest Common Factor (GCF) of a set of whole numbers is the largest positive integer that divides evenly into all numbers with a zero remainder.

• True

• False

The prime factorization of 50 is:

_________________ is simply the smallest common multiple between two or more numbers.

The factors that 45 and 60 have in common are:

• 1, 2, 5, 15

• 1, 3, 9, 15

• 1, 3, 5, 15

• 1, 5, 6, 15

The Greatest Common Factor (GCF) of 45 and 60 is:

• 9

• 5

• 10

• 15

List the following multiples: _____, 16, 24, ____, 40, ____

What is the Least Common Multiple of 4 and 15?

What is the Prime Factorization of 150?

• 5 x 2 x 3 x 5

• 2 x 3 x 5 x 5

• 3 x 2 x 5 x 5

• 5 x 3 x 2 x 5

What is the Least Common Multiple (LCM) of 14 and 21?

At the gym, Anferny swims every 6 days, runs every 4 days, and cycles every 16 days. If he started all three activities today, what is the least amount of days he will do all three activities again on the same day?