Name: Anonymous 2007-10-03 12:21
Recently I ran into this problem in the M. Gardner's Mathematical Circus.
What is the quickest way to measure 9 minutes with a 4-minute hourglass and a 7-minute hourglass?
Assuming you are unable to measure fraction intervals; ergo you cant measure 2 minutes.
What is the quickest way to measure 9 minutes with a 4-minute hourglass and a 7-minute hourglass?
Assuming you are unable to measure fraction intervals; ergo you cant measure 2 minutes.