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Results tagged with mathematics
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user 19220
A puzzle related to mathematical facts and objects, whose solution needs mathematical arguments. General mathematics questions are off-topic but can be asked on Mathematics Stack Exchange.
1
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1
answer
174
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UFO in a hurry #1: land at a power plant
A UFO is at one kilometer altitude, and one kilometer due east of a power plant on the ground it wants to investigate.
The UFO has infinite acceleration but is limited to a speed of ( altitude + 1km …
- 548
1
vote
Help understanding the solution to a "shooting puzzle"
Actually: ALL SURVIVE. No-one shoots.
Jones fires into the air, in the hope one of Brown and Smith kill the other, at which point Jones would fire at the survivor.
After Jones fires into the air, B …
- 548
12
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3
answers
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Three Cafes Puzzle
Every morning a couple has breakfast at one of three cafes:
Amy's, Bob's, or Cindy's.
After eating at Amy's or Bob's, they flip a coin to see which
of the other two cafes they'll go to the next mo …
- 548