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Results tagged with mathematics
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user 10355
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
votes
The Faulty Keypad Safe
I originally encountered this as requiring a pattern that a human could execute without having to memorize a long sequence, even if it made the total number of numbers pressed longer. My solution to c …
- 231
13
votes
Ten girls around a table
Less rigorous and mathematical, but perhaps more intuitive approach:
(a) note that for each girl,
(b)
(c)
(d) to check the work, go the other way around the circle:
- 231