GCF/LCM Review

What is the GCF of 12 and 8?

• 8

• 12

• 4

• 2

What is the LCM of 4 and 7?

• 4

• 7

• 14

• 28

True or False: Factors can be LARGER than the umber they are a factor of. (Example: 12 can be a factor 8)

• True

• False

What is the LCM of 10 and 8?

• 40

• 50

• 64

• 10

What is greater, the LCM of 3 and 4 or the GCF of 12 and 24?

• The LCM of 3 and 4

• The GCF of 12 and 24

• They are equal

What is a larger fraction, 2/4 or 3/4?

• 2/4

• 3/4

• They are equal

Mr. Kahan has 16 red pens and 8 blue pens. He wants to split them up into groups that have an equal number of red pens and blue pens in each group. What is the greatest number of groups you can make?

Is this a GCF question or an LCM question?

• GCF

• LCM

Mr. Kahan has 16 red pens and 8 blue pens. He wants to split them up into groups that have an equal number of red pens and blue pens in each group. What is the greatest number of groups you can make?

• 8

• 2

• 16

Mister H eats a bacon egg and cheese every 3 days for breakfast and Big Macs for dinner. What is the least amount of days that will pass before he will eat a bacon egg and cheese for breakfast AND a Big Mac for dinner?

Is this question asking you to find the LCM or the GCF?

• LCM

• GCF

Mister H eats a bacon egg and cheese every 3 days for breakfast and Big Macs for dinner. What is the least amount of days that will pass before he will eat a bacon egg and cheese for breakfast AND a Big Mac for dinner?

• 4

• 6

• 8

• 12