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.
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.
Half a poodle riddle: Once from her latest litter of French poodles, Sonia sold half of the litter and half a poodle to the local pet shop...read on...
Move 6 matches to make 5 squares from the puzzle figure. No matchstick can be kept hanging not as a side of a square. Time to solve 10 minutes.
A milkman has to deliver 1 quart of milk each to a 4 pint and a 5 pint jug from his two 10 gallon filled up milk cans. Time to solve 20 mins.
Peter and Paul are always lying and truth-telling twins. You ask one of them, "Is Paul the lying one?" And he answers, "Yes." Whom did you ask the question?
Airplane Riddle of Flying Around the World: One airport can be used by airplanes. An airplane carries enough fuel to fly halfway across the globe...
How many addition signs should be put between digits of 987654321 to equal 99? Where should they be placed? Time to solve 10 minutes.
