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.
In the matchstick puzzle figure, remove 6 matches to leave exactly 2 squares. No matchstick should be left hanging. Each must be a part of a square.
The puzzle figure comprises two large triangles intersecting each other. Move 4 matches to make 6 triangles. No matchstick should be left hanging.
Remove 5 matches to leave 5 squares in the puzzle figure comprising as many as 10 squares of same size. No match must be left hanging.
In the matchstick fish figure of the puzzle turn the Westerly fish to Southerly swimming fish in 2 moves of matchsticks or the eye of the fish.
In the puzzle figure, move 3 matches of 6 squares to create 5 squares. No matchstick should be kept hanging. Do give it a try.
To the puzzle figure of a single diamond, add 10 matches to create 5 diamonds. No matchstick should be left alone hanging.
In the matchstick puzzle figure of a pig, turn around the face of the pig in 2 moves. Do give a try to solve this interesting little puzzle.
Can you remove 4 matches to leave 6 diamonds in the puzzle figure of eight diamonds made up of matchsticks? No matchstick should be left hanging.
In the puzzle figure, 7 triangles are enclosed by the 9 matchsticks. Can you enclose maximum number of triangles by 9 matchsticks?
4 matches divide the whole into two equal areas of same shape. Move these 4 matches to divide the whole into two equal areas of same shape again.
