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High School
By
Shiva Kintali
on June 20, 2012 | Updated Dec. 6, 2017
Truthteller and Liar
You played a long role-playing treasure-hunting game for several hours and finally reached end of the last level of the game. You see two doors (\(A\) and \(B\)), and your treasure is behind one of tw…
Puzzles
Puzzles
logic puzzle
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High School
By
Shiva Kintali
on June 21, 2012 | Updated Dec. 6, 2017
Togglers and Truthtellers
There are five people. Four of them are togglers, and the fifth person is a truthteller. A toggler tells either the truth or lie when you ask him a question. The second time you ask him a question…
Puzzles
Puzzles
logic puzzle
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High School
By
Shiva Kintali
on July 18, 2012 | Updated Dec. 6, 2017
Red Blue Hats
There are 10 people and 10 hats. Each person is assigned a random hat, colored either RED or BLUE, but the number of each colored hat is not known to them. They will be lined up such that each person …
Puzzles
Puzzles
logic puzzle
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Undergraduate
By
Shiva Kintali
on June 22, 2012 | Updated Dec. 6, 2017
100 perfect logicians
100 perfect logicians are told to sit in a circle in a room. Before they enter the room, they are told at least one person has a blue forehead. When you determine your forehead is blue, you need to le…
Puzzles
Puzzles
logic puzzle
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