Brain Teasers, Riddles, Puzzles and more...
With over 15,000 brain teasers, riddles, logic problems and mind puzzles submitted and ranked by users like you, Braingle has the largest collection anywhere on the internet. If you need a brain teaser, mind puzzle or riddle, we are the place to get it. Get ready to have your brain tangled!
Optical Illusions
A deceptive or misleading picture that is caused by the disagreement of the eye and the mind.
The Hypatia
A Puzzling Space Mystery
An engaging short story about an interstellar spacecraft with over 25 original hand-crafted puzzles that you can print out and complete. Solve the puzzles to unlock the next chapter in the unfolding mystery about what happened onboard The Hypatia. There are multiple paths through the story and many puzzles to solve in this unique interactive puzzle experience.
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Daily Brain Teaser
Probability
How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?
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Answer
Life or Death? The Emperor's Proposition
You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles and 2 empty bowls. He then says, "Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die."How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?
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Answer
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