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.
This is a rather long list of challenging brain teasers with solutions. The brain teasers are hand-picked and solutions focus on systematic problem solving.
In the puzzle figure of two small triangles and one large triangle, move 3 matches to form 2 large and 1 small triangle with no hanging stick.
A farmer bought 100 cows, sheep and chickens at Rs.1000. Cost of cows Rs.50 each, sheep Rs.10 each, and chickens 50 paise each. How many of each purchased?
In the puzzle figure of 5 matchstick squares, move 3 sticks to form six squares. No matchstick should be hanging. Each should be a part of a square.
The matchstick puzzle figure comprises four triangles. Move 4 matches to leave 2 triangles. Each matchstick must be a part of a triangle.
In the matchstick puzzle figure, move 5 matchsticks to create 7 squares. No matchstick should be left hanging without being part of a square.
The matchstick puzzle figure comprise only of squares. Can you move 3 matchsticks to form a matchstick figure comprising only of 3 rectangles and no square?
In the puzzle figure, move 3 matches to form 6 squares. Each matchstick in the solution should be a part a square. Give it a try. It is not a hard puzzle.
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.
