Here are some of the medium puzzles:
- 35. In three boxes we have one containing 2 black marbles, one with 2 white marbles and one with a black and a white. The boxes are all labeled wrongly. How many times must you pick a marble blindly out of one box to correctly identify what each box contains?
- 36. A single elimination tennis tournament starts with a certain number of players. How many matches must be played until a winner is arrived at
a) in a tournament with 100 players?
b) in a tournament with 1,500 players?
c) in a tournament with 147,690 players?
- 37. You have 12 black sox and 12 white sox mixed up in a drawer. How many sox must you pull out - blindly -to be sure of getting a matching pair?
Riddles 38-67 have been temporarily taken down. We encourage you to EMAIL YOUR ANSWERS to riddles 35, 36, and 37 to firstname.lastname@example.org There are potential prizes and good karma for those with the three correct answers. Good luck!
Click here to learn how to get the answers.
© 2002-2003 Benjamin Kovler