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.
An officer and 269 soldiers in his army detachment are to cross a river. Two boys are rowing about in the river in a small boat. The boat is...read on...
Encrypted Arithmetic puzzle of addition: EAT and THAT are added to produce the result APPLE. Each letter is a different number. Find the letters values.
Math Olympiad Question: 2a + 2b + 2c = 148, a, b, c = ?. Can you solve in 2 minutes? Use basic math concepts and reasoning.
Crack the five clue number lock puzzle with code 241 in a clue. The clues are with a 3 digit code and correctness descriptions of digits and positions.
Seven clues are given, each with a 4 digit code and hints on correct digits and their placements. Find the correct code from the clues to open the lock.
Given five clues, each with a 5 digit code and hints on correct digits and their placements, can you find the correct code from the clues to open the lock?
In this number lock puzzle with clue code 682 and 5 clues, each clue describes position and correctness of 3 digits in its code. Can you crack the code?
Challenge: Find the correct number lock code from three Clues each with a 3 digit code and hints on correct digits and their placements. Time 5 minutes.
Number lock puzzle 9285: Can you crack the 4 digit number lock code from the five clues? Each 4 digit clue hints on correct digits and placements.
Twin birth statistics puzzle: In a year, 3% of births give rise to twins. What percentage of population is a twin: 3%, less than 3% or, more than 3%?
