Question

During the summer months, one ice cream truck visits Dipanshu's neighbourhood every 4 days and another ice cream truck visits his neighbourhood every 5 days. If both trucks visited today, when is the next time both trucks will visit on the same day?

• A. 10
• B. 9
• C. 20
• D. 40

Answer 1

The correct option is C

20

Since LCM of 4 and 5 is 20, both ice cream trucks will visit Dipanshu's neighbourhood next time in 20 days.