LCM Word Problems

The Ferry's wheel at an amusement park runs every 30 minutes, and the roller coaster operates every 25 minutes. if the two rides are running now, how many hours will it take for them to be running together at the same time again?

• 50 minutes

• 75 minutes

• 125 minutes

• 150 minutes

A high-flying event manager, Laura organizes an event every 2 days. A small-time event organizer, Kevin host an event per week. If both Laura and Kevin are organizing events today, how long will it be until the two operate on the project on the same day again?

• 8 days

• 10 days

• 14 days

• 15 days

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?

Do I find the GCF or the LCM?

• GCF

• LCM

The school cafeteria serves tacos every sixth day and cheeseburgers every eight day. How many days will it be before they are both on the menu? Do I find the GCF or the LCM?

• GCF

• LCM

Wilma is thinking of a number that is divisible by both 17 and 8. What is the smallest possible number that Wilma could be thinking of? Do I find the GCF or the LCM?

• GCF

• LCM

I am planting 50 apple trees and 30 peach trees. I want the same number and type of trees per row. What is the greatest number of trees I can plant per row?

• 3

• 5

• 10

• 15

John goes to the park every 2 days. Brian goes to the park every 6 days. Which days will they both be at the park?

• 2

• 4

• 6

• 8

Boxes that are 12 inches tall are being stacked next to boxes that are 8 inches tall. What is the shortest height at which the two stacks will be the same height?

• 8

• 12

• 16

• 24

Two clocks are turned on at the same time. One clock chimes every 15 minutes. The other clock chimes every 25 minutes. In how many minutes will they chime together?

• 55 minutes

• 25 minutes

• 60 minutes

• 75 minutes

Melanie and Martin are both building a toy train track out of connecting pieces. Melanie has pieces that are 8 inches long while Martin's pieces are 20 inches long.  How long will the shortest track be that they can each build with the same length?

• 2

• 40

• 4

• 20