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.
Riddle of Name of the Engineer: three businessmen with similar names as three railwaymen live in three cities. Given six conditions, find name of engineer.
In ten barrel face number riddle, rearrange ten barrels in a pyramid so that sum of face numbers of four barrels on each outer side is equal and minimum.
Two circles and a line riddle: Can you traverse all parts of the puzzle figure without lifting your pencil or crossing a line? Time to solve: 15 minutes.
In the puzzle figure, move 3 matches to make 7 squares. You have 5 minutes to solve the puzzle. And know how to solve easily from the solution.
The number lock puzzle poses 5 clues on 3 digit codes. From the clues, the correct three digit code that'll open the lock is to be discovered in 10 mins.
Can you find the three digit code to open the number lock? You have five clues each based on a code combination. You have 5 minutes to solve the riddle.
Join the nine dots in a 3-by-3 grid by 4 straight lines without raising the pencil. Solve in 30 mins. Learn how to solve the tough puzzle from the solution.
Add 9 matches to make 8 nodes in the puzzle figure of a triangle of 3 nodes made up of 3 matchsticks. Time to solve: 5 minutes. Try applying reason.
Can you find the three-digit code to open the number lock? You have five clues each based on a code combination. Time to solve the riddle, 10 minutes.
In matchstick figure, remove 3 matches and leave 3 triangles. You have 10 minutes to solve the puzzle. Try and then learn how to solve from solution.
