February 2008
Intermediate to advanced
192 pages
8h 37m
English
Puzzle This
By Michael H. Pryor
MAKE’s favorite puzzles. (When you’re ready to check your answers, visit makezine.com/13/aha.)

On October 2, 2001, the date in MM/DD/YYYY format was a palindrome (the same forward as backward): 10/02/2001.
When was the last date before 10/02/2001 that this phenomenon occurred?
You have 2 identical crystal orbs. You need to figure out at what height an orb can fall from a 100-story building before it breaks. You know nothing about the toughness of the orbs: they may be very fragile and break when dropped from the first floor, or they may be so tough that dropping them from the 100th floor ...