LCM Three Numbers

Find the LCM of each set of numbers. 
 4, 5, 6 

• 20

• 36

• 45

• 60

Find the LCM of each set of numbers. 
5, 10, 15 

• 50

• 30

• 90

• 150

Avery gets newsletters by e-mail. He gets one for sports every 5 days, one for model railroads every 10 days, and one for music every 8 days. If he got all three today, how many more days will it be until he gets all three newsletters on the same day again?

• 80 days

• 40 days

• 50 days

• 60 days

Find the LCM of 5, 6, and 15

• 30

• 45

• 60

• 120

Find the LCM of 5, 9, and 15

• 90

• 45

• 80

• 180

The least common multiple is the _______________, multiple other than 0, commmon to sets of multiples.

• greatest

• least

Three bells ring at the interval of 15,20, 30 minutes respectively. If they ring together at 12 noon. When will they again ring together?

• 12:30 pm

• 12:45 pm

• 1 pm

• 1:30 pm

At the gym, Hillary swims every 6 days, runs every 4 days and cycles every 16 days. If she did all three activities today, in how many days will she do all three activities on the same day? (hint LCM)

• 16

• 24

• 48

• 32

Is this question asking to find GCF or LCM?

• GCF

• LCM

Matthew goes hiking every 2 days and swimming every 6 days, He did both kinds of exercise today. How many days from now will he go both hiking and swimming again?

• GCF, 2 days

• LCM, 12 days

• GCF, 12 days

• LCM, 13 days