Real-World LCM Challenges: Scheduling Everyday Tasks

Anna and Ben are planting flowers. Anna plants a flower every 4 days, and Ben plants a flower every 6 days. How many days will it take for both of them to plant flowers on the same day again?

• 12 days

• 10 days

• 8 days

• 14 days

A bus leaves the station every 15 minutes, and a train leaves every 20 minutes. If they both leave at the same time, how long will it be until they leave together again?

• 45 minutes

• 75 minutes

• 60 minutes

• 30 minutes

Sarah is practicing her piano every 8 days, and her brother is practicing his guitar every 12 days. When will they both practice on the same day again?

• 30 days

• 16 days

• 20 days

• 24 days

A baker makes a batch of cookies every 10 minutes and a cake every 15 minutes. If he starts at 8:00 AM, at what time will he be making both cookies and a cake again?

• 8:15 AM

• 8:30 AM

• 8:45 AM

• 8:00 AM

Two friends, Lisa and Mark, are running laps. Lisa completes a lap every 5 minutes, and Mark completes a lap every 7 minutes. How long will it take for them to complete a lap together again?

• 42 minutes

• 28 minutes

• 35 minutes

• 30 minutes

A gardener waters the plants every 9 days, while a neighbor waters their garden every 6 days. When will they both water their gardens on the same day?

• 15 days

• 12 days

• 18 days

• 24 days

A movie theater shows a film every 30 minutes, and a concert starts every 45 minutes. If both start at 6:00 PM, when will they start at the same time again?

• 7:30 PM

• 7:00 PM

• 8:00 PM

• 6:30 PM

Tom and Jerry are cycling. Tom cycles every 12 minutes, and Jerry cycles every 16 minutes. How long will it be before they cycle together again?

• 24 minutes

• 36 minutes

• 48 minutes

• 60 minutes

A school bell rings every 25 minutes, and a lunch bell rings every 35 minutes. If both bells ring at 12:00 PM, when will they ring together again?

• 1:30 PM

• 2:00 PM

• 2:55 PM

• 3:20 PM

A dog barks every 18 minutes, and a cat meows every 24 minutes. If they both start at the same time, how long until they make their sounds together again?

• 60 minutes

• 72 minutes

• 48 minutes

• 90 minutes