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.
How can two friends with different walking and cycling speeds cover 20 miles sharing just one bicycle between them and reach the destination at same time?
Cross the stream from first bank to second by stepping on the 8 stones. Visit second bank twice and first bank once more. Cross in minimum number of steps.
In the 4 square area puzzle figure, move 4 matches to form 3 square area. There must be a single area enclosed by matchsticks. Solve on 20 minutes.
Move 4 matchsticks to make 6 squares from the 5 square matchstick puzzle figure. Time to solve 10 minutes. Give it a try. It's a not too hard fun puzzle.
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.
