Science Forums » Brain Teasers and Puzzles
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Science Forums » Brain Teasers and Puzzles
1M ago
Hi everyone, thougt i would post this intersting one:
7 Sales executives have 1 million dollars to divide amongst themselves. The most senior sales executive propses a particular split and then everyone votes (each person's vote is equal). If at least 50% of the people accept, then the money is divided the way that was suggested. Otherwise the sales executive who propsed it gets fired...and then we move on to the next senior sales exec and the whole process repeats. The executives are rational (want to keep their jobs first and also get as much money as possible), and they also would pr ..read more
Science Forums » Brain Teasers and Puzzles
8M ago
Why does the hourglass not start rising right away?
..read more
Science Forums » Brain Teasers and Puzzles
8M ago
If *C* is a Cube and *S1* is the Sphere Inscribed and *S2* is the Sphere Superscribed then
(1) What is the fraction of the volume of *C* is contained in *S1*
(2) How many times the volume of *S2* is that of *S1 ..read more
Science Forums » Brain Teasers and Puzzles
8M ago
Here are n circles of radius r arranged in a closed string. The centers of the adjacent circles are connected with straight lines. What is the difference between the orange and the blue areas?
..read more
Science Forums » Brain Teasers and Puzzles
8M ago
Cut a Cube into six identical pieces each having nine edges ..read more
Science Forums » Brain Teasers and Puzzles
9M ago
I guess I'll start;
You all want me, knowing I will hurt you, I'm oh so flattered you think me a virtue.
If you let me in, good and bad times I will bring, I've won more battles than any man or king.
Sometimes I'm dark, sometimes I shine, some think me a curse while others think me divine.
If you guess my name, then I'll raise a toast, you'll be with the one who invites me the most ..read more
Science Forums » Brain Teasers and Puzzles
9M ago
I've received this "riddle" from a friend this morning:
Doing my best to translate it to English here, while cutting off irrelevant details.
Bob got an electronic clock in shape of an apple. It shows time with a precision of a hundredth of a second. As he was moving down on an escalator, Bob threw the clock up and noticed that at the top of its trajectory the clock showed 11:32:45:81. His teacher Mary was moving up on the escalator at the same time, and she noticed that the clock showed 11:32:45:74 at the top of its trajectory. Find the speed of the escalators, given that they move with the s ..read more