Critical Thinking Puzzles

September 17, 2015

A Probability Problem With Pearls

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"I'm a very rich man, so I've decided to give you some of my fortune. Do you see this bag? I have 5001 pearls inside it. 2501...
3 comments:
September 10, 2015

Probability Heaven Puzzle

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A person dies, and he arrives at the gate to heaven. There are three doors in the heaven. one of them leads to heaven. another one leads to...
1 comment:
September 2, 2015

Birthday Puzzle

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The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?
6 comments:
August 28, 2015

If 1111=R, 2222=T, 3333=E, 4444=N Then 5555=?

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If 1111=R, 2222=T, 3333=E, 4444=N Then 5555=?
10 comments:
August 1, 2015

Two Paper Cubes Puzzle

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A man has two paper cubes on his desk. Every day he arranges both cubes so that the front faces show the current day of the month. What num...
9 comments:
July 23, 2015

Misfortune Clock

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You have the misfortune to own an unreliable clock. This one loses exactly 20 minutes every hour. It is now showing 4:00am and you know tha...
14 comments:
July 6, 2015

Probability Puzzle: Tossing of Coins

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A man tosses three coins in the air. When they land, he finds that two of the coins have heads up and one has tails up. What is the probabi...
6 comments:
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