Question

Mel and Rob set the alarms on their phones to sound at 6:45am.

Both alarms sound together at 6:45am

Mel’s alarm then sounds every 9 minutes.

Rob’s alarm then sounds every 12 minutes.

At what time will both alarms next sound together?

Answer 1

7:21 am

Explanation:

9 18 27 36

12 .24 36

36 minutes later