Subj:.....Two Hourglasses           From: LABLaughs.com on 7/6/2002           (S262b, S643) . Photo from La Crosse McCormick...

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If you have two hourglasses --  one a four-minute timer and the other a seven-minute timer,  how can you measure nine minutes?  . . Finger pointing down from darrell94590 on 1/2/2006 .       Drawing from Ripleys-Believe It Or Not ..               THE SOLUTION     Turn over both hourglasses at once.  When the four-minute hourglass runs out, turn it over.  When the seven-minute hourglass runs out, turn it over.  When the four-minute timer runs out this time      (eight minutes have elapsed),  the seven-minute hourglass has been running for one minute.  Now turn over the seven minute timer back over.  When the timer runs out,  nine minutes have elapsed.

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