You have an old-fashioned refrigerator with a small freezer compartment capable of holding seven ice cube trays stacked vertically. But there are no shelves to separate the trays, and if you stack one tray on top of another before the ice cubes in the bottom tray are fully frozen, the top tray will nestle into it, and you won't get full cubes in the bottom tray. You have an unlimited supply of trays, each of which can make a dozen cubes.

What's the fastest way to make full-sized ice cubes?

Fill one ice cube tray and put it in, then put an empty one upside down on top of it. This will not 'nestle' into the other one, and you can then place another water-filled tray on top, and so on, until you get 4 trays with water in and 3 trays without.

Posted by Lewis on 2003-07-19 09:47:39