LCM and GCF

Find the LCM of 12 and 6. 

• 6

• 12

• 2

• 1

Find the GCF of 64 and 144

• 8

• 6

• 16

• 2

Find the GCF of 44 and 55

• 11

• 1

• 99

• 3

Matthew and Polly are each assigned a paper for a class they share. Matthew decides to write 9 pages at a time while Polly decides to write 12 pages at a time. If they end up writing the same number of pages, what is the smallest number of pages that the papers could have had?

Do you need to find the GCF or LCM?

• GCF

• LCM

Determine the least common multiple for

the pair of numbers.

24 and 40

• 24

• 120

• 8

• 40

What is the GCF of 18 and 24?

• 3

• 6

• 8

• 9

What is the least common multiple (LCM) of 4 and 10?

• 4

• 40

• 15

• 20

Two neon signs are turned on at the same time. Both signs blink as they are turned on. One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again?

• 48 seconds

• 45 seconds

• 16 seconds

• 8 seconds

LCM (9, 12)

• 9

• 36

• 12

• 3

Find the GCF:

24, 60