For each one, first the puzzle is posed for you to solve within a recommended time. A detailed systematic solution then follows.
Matchstick puzzles, riddles, math puzzles, logic puzzles, river crossing puzzles, ball weighing puzzles are some of the categories.
The full list of all brain teasers with solutions is available in the link,
Challenging brain teasers with solutions: Long list.
This will always be the most up-to-date list with the brain teasers classified into categories that can be browsed separately.
Flipping coins to heads or tails logic puzzle: Make a second pile of coins from the first pile blindfolded with same heads-up coins in both. Read on...
By solving a puzzle similar to the Generous Gifts puzzle of Dudeney, we'll in effect solve three similar puzzles. This is possible by domain mapping method.
In Liar, Truth-teller, Random-Answerer Riddle, a traveler can ask two questions to decide which is the safe path out of two. What to ask?
4 Prisoners and Hats Puzzle: Alien chief offered a game of freedom or death to his 4 prisoners. Each will wear a hat and guess its color. Can anyone win?
In the seven squares figure of matchsticks, move 3 matches to make 5 equal squares. No match should be overlapping or left hanging. Time to solve 20 mins.
Transfer 1 match in two matchstick groups puzzle: Transfer 1 match from Group 2 to Group 1 to make Group 2 three times of Group 1. Solve in 15 mins.
Transfer a pile of 15 numbered discs from square A to square F on a board with 6 squares in minimum moves. Ensure: A disc can't be on a lower numbered disc.
Remove 4 matches to leave 4 equal triangles with every matchstick as a part of a triangle. Time to solve 15 minutes. Have a try. It's a fun puzzle.
In the matchstick figure, move 4 matches to make 5 triangles with no match kept hanging not being a part of a triangle. Time to solve 15 minutes.
From a hexagon of matchsticks move 2 matches and add 1 to make 2 diamonds. Time to solve the tricky matchstick puzzle is 5 minutes.
