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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 min…

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 min…
asked 93.1k views
5 votes
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?

asked
User Chansen
by
7.2k points

1 Answer

1 vote

Answer:

7:21 am

Explanation:

9 18 27 36

12 .24 36

36 minutes later

answered
User BiigNiick
by
7.3k points
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