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.
You'll enjoy solving its 50 hand-picked puzzles, but you'll also learn how to solve hard problems easily without random attempts by innovative methods.
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.
Can you crack number lock puzzle 829 in a few simple steps using 5 clues? Each clue shows hint code and digit-position correctness.
Can you crack open number lock puzzle 940 in just two powerful steps? Each clue shows the correctness of digits and their positions.
Can you solve number lock puzzle 392 in three short and quick steps? Each clue shows hint code and digit-position correctness.
Can you solve number lock puzzle 143 in a quick series of breakthroughs? Each clue shows hint code and digit-position correctness.
Can you solve number lock puzzle 143 with 5 clues? Each of the clues shows a 3 digit hint code stating how many are correct in correct or wrong position.
Can you crack number lock puzzle 602 with 5 clues? Each of the clues shows a 3 digit hint code stating how many are correct in correct or wrong position.
Can you solve 3 digit number lock puzzle 158 in two steps of logic analysis? Given: 5 clues with hint codes and position-correctness information.
Break open the number lock code from five hint clues. Each clue in the number lock puzzle includes a 3 digit code and digit and position information.
