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.
Move 3 matches to make 2 squares in 1st matchstick puzzle of this type. How many solutions can you find? Time limit 5 minutes. Give it a try. It'll be fun.
5 squares puzzle: move 8 sticks to make 2 squares in the 5 squares puzzle figure. How many ways can you solve the puzzle? You have 30 minutes to solve.
Move 3 matches to make 3 squares in the puzzle figure. How many solutions can you find? Time to solve 10 minutes. It's not a difficult puzzle and you should enjoy solving it...
Move 3 matches to make 4 squares from 5 squares puzzle figure. This is the 4th 5 squares matchstick puzzle of this type. You have to solve it in 10 minutes.
Move 2 sticks to make 5 squares from the 6 squares matchstick puzzle figure. How many ways can you do it? You have 10 minutes to solve the puzzle.
Kite Matchstick Puzzle: Move 5 matches to make the Kite dive down. This is a direction reversing puzzle that is not easy to solve in given time of 20 mins.
In the 5 squares matchstick puzzle figure you have to move 3 matchsticks to make 4 squares. You have 10 mins to solve this 3rd 5 squares matchstick puzzle.
Remove 4 sticks to leave 3 triangles in hexagonal wheel matchstick figure. Recommended time to solve 8 minutes. Hint: First solve remove 3 to leave 4.
Cheryl's Birthday Problem: Cheryl gives Albert and Bernard 10 possible dates for her birthday and also a few clues. You have to find Cheryl's birthday.
Move 3 matches to make 3 squares from the Tic Tac Toe matchstick figure. How many unique solutions can you find? Recommended time to solve 5 minutes.
