| SITE LISTINGS |
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| Alphabetical | By Popularity (What's This?) | | - Contest Center
 - Offers contests with cash prizes. Also includes crosswords, riddles, anagrams, cryptograms, and other word games. - MIT Mystery Hunt
- Annual competition held at the Massachusetts Institute of Technology during the January Independent Activity Period (IAP). Challenges each team to solve a large number of puzzles which lead to a coin hidden somewhere on campus.
- Newspaper Cryptogram and Contest
- Compete in three daily cryptogram puzzle contests from the Daily Cryptogram, a part of the Minneapolis Star and Tribune newspaper.
- Paradox of Pandora's Rombox
- The key is on the inside, and you are not. Solve the paradox and receive a treasure.
- Roadtrips
- Interactive Web games where players who solve the puzzles are eligible to win ca$h and other cool prizes!
- Todays Chuckle
- Daily jokes, brain teasers and much much more. Win a free T-shirt in the brain teaser competition.
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