May 2007
Intermediate to advanced
190 pages
7h 58m
English
Content preview from Make: Technology on Your Time Volume 10
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AHA! Puzzle This
MAKE’s favorite puzzles. (When you’re ready to check your answers, visit makezine.com/10/aha.)
Switch or Miss
Late one night, an evil witch rounds up 23 maidens from the surrounding village and makes them prisoners in her dungeon. The next morning she tells the maidens she will free them if, and only if, they can pass the test she has devised.
A room in the tower of the castle has two switches (we’ll call them switches A and B). The witch says, “Whenever I feel like it, I will lead any one of you to the top of the tower and make you toggle one of the switches (either move it from the up position to the down ...