Vocabulary and the Basics
What does LCM stand for?
Least common multiple
Find the LCM of 3 and 5.
15
Find the LCM of 24 and 36.
72
A radio station plays "Cool" by the Jonas Brothers once every 3 days.
Another station plays the same song once every 7 days. In how many days will both radio stations play the same song on the same day?
21 days
What is a multiple?
The product of two numbers.
Find the LCM of 8 and 12.
24
Find the LCM of 12 and 15.
60
A train to New York city leaves a station every 7 minutes. Another train to Boston leaves the station every 35 minutes.
In how many minutes will both trains leave the station together?
35 minutes
What does least common multiple mean?
The smallest number that is a multiple of two or more numbers.
Find the LCM of 10 and 5
10
Find the LCM of 20 and 40.
40
Today both the soccer team and the basketball team had games. The soccer team plays every 3 days and the basketball team plays every 5 days. When will both teams have games on the same day again?
15 days
List the first five multiples of 5
5, 10, 15, 10, 25
Find the LCM of 6 and 7.
42
Find the LCM of 36 and 48.
144
Maddie saves 9 dollars every day while John saves 15 dollars every day.
How many days will it take for them to save the same amount of money?
45 days
List the first five multiples of 10.
10, 20, 30, 40, 50
Find the LCM of 1 and 10.
10.
Find the LCM of 16 and 7.
112
Donald collects 10 pieces of bubble gum a day. Amelia collects 15 pieces of bubble gum a day.
How many days will take for Donald and Amelia to have the same amount of bubble gum?
30 days