Braingle
2,100 brain teasers, riddles, logic problems and mind puzzles submitted and ranked by users.
Brain Food
Give your mind a work out with this collection of puzzles, ranging from word games to logic problems to riddles. All require thinking power.
Fun Hits
Brainteasers, puzzles, illusions, and games. Many are interactive.
Bordwell Logic Puzzles
A new logic puzzle each month. Successful solvers have a chance to win a t-shirt.
Brain Bashers
A collection of logic, language and math puzzles with the occasional paradox.
Brain Teasers
From Houghton Mifflin, a good selection of teasers for various grade levels from 3 to 7+. Other student/teacher/parent resources featured.
Cool Puzzles
A good selection of brain teasers and logic puzzles as well as cryptic style puzzles. Various levels of difficulty. Submit your answers via email. First three solverers have their names published.
Critical Thinking
A selection of brain teasers from Michael DiSpezio's new book, Critical Thinking Puzzles. Pyramid Passage, Spare My Brain, Putting It Together, Fractured Farmland, Kitchen Cups.
Kid's Place Brainteasers
Weekly math problems for kids in grades 3-8.
EncyloZine Logic Puzzles
Illustrated encyclopedic portal covering a wide range of topics including puzzles. Very interesting. Don't miss the optical illusions.
Exidor's Logic Puzzle Place
Various logic puzzles. A selection of oldies.
The Grey Labyrinth
From Kevin Lin, who says, "Its purpose is to stimulate interest and curiousity into... the human mind" Lots of good riddles.
How To Solve Logic Problems
From Puzzlemakers Ltd. A good introduction to the basic solving techniques for logic puzzles. Sample logic puzzles of varying difficulty are also available.
Just Riddles and More
This site is riddled with... riddles. Ouch! Math and logic puzzles are also featured.
Lateral Puzzles
Register (free) and then discuss, solve and set lateral thinking puzzles. Recommended.
The Logic Problems Page
A good site with introduction, examples, tips, links, and lots of puzzles. Last update: 08/14/98
Logic, Words and Numbers
From Mensa Australia. Choose regular or harder from this selection of puzzles. No longer updated.
Mathematics Miscellany and Puzzles
Advanced math logic puzzles as well as math puzzles and riddles. Many interactive (Java).
Mensa Workout
You have 30 minutes to answer 30 questions. Answers and discussion of the answers is provided. I managed to get 21 right (with a minimum of cheating).
Norfolk Academy Logic Test
Take this simple test to see if you have a logical mind.
Primrose Puzzles
Rational thinking, a logical mind, and raw brain power but no mathematical formulae are required to solve any of these puzzles.
The Puzzle Spot
From Sally Quinn. an eclectic offering of puzzles from original logic to old optical illusions.
rec.puzzles archives - Logic
Classic and contemporary logic puzzles. Edited by Arlet Ottens.
rec.puzzles archives - Riddles
Classic and contemporary riddles. Edited by Arlet Ottens.
Suzy Red's Logic Puzzles
The objective of these puzzles is to get students to use comprehension strategies and vocabulary to solve logic problems. Printable grids are provided.
Tweedledum and Tweedledee
Five puzzles, each with a unique solution. Can you figure it out? Courtesy of Erich Friedman.
The Ultimate Puzzle Site
This site has a nice selection from easy to hard and the authors "guarantee that all puzzles and riddles on our site are interesting."
Uncommonly Difficult IQ Tests
Riddles, conundrums and IQ tests.
