You have to boil a single egg for exactly nine minutes.
All you have are two hourglasses, able to measure (in sand) seven and four minutes, respectively.
How quickly, using only these two hourglasses, can you boil an egg?
(In reply to
16 minute query by Dulanjana)
You have apparently forgotten that the ultimate goal is to manage to time an exact 9 minute interval.
Steve arnold and "Your Mom" focussed on 16 minutes because 4 * 4 = 16 and 7 + 9 = 16, so the four minute timer can time out the 16 minutes and the seven minute timer can "waste" the first seven minutes, leaving nine to boil the egg.
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Posted by TomM
on 2002-07-11 12:01:34 |
re: 16 minute query
