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?

you dont understand the hard part
you have to use the timers
and use them in a way which it takes you the least amount of time to cook the eggs
but you are sure theyve cooked for atleast 9 minutes

Posted by qball on 2002-07-06 23:23:32