2 Answered Questions for the topic Beth

Beth

06/17/15

How do you know when 30 minutes is up?

You have exactly 30 minutes to get out of a room. All you have is a 9 minute hour glass and a 13  minute hour glass to count off exactly 30 minutes.  
Beth

06/17/15

How do you know when 30 minutes is up?

You have exactly 30 minutes to get out of a room. All you have is a 9 minute hour glass and a 13  minute hour glass to count off exactly 30 minutes.  

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