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Results tagged with mathematics
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user 29567
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.
2
votes
2
answers
378
views
The Grand Exercise in Following Directions
This is not an original puzzle. This puzzle was created by a really cool TA at my summer math camp, for a puzzle hunt that was started in compensation for a cancelled math tournament. I just thought t …
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4
votes
Accepted
The Grand Exercise in Following Directions
Heh, finally (re)cracked it.
The key to this puzzle is this:
Now...
But...
Now let's roll!
- 9,917
9
votes
3
answers
686
views
A Mathematical Discussion: Fill in the Blank
I originally saw this on r/puzzles, and thought it deserved a place here. I have a solution to this puzzle, but it's really long and ugly. If anyone comes up with something simple, please share!
…
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23
votes
Accepted
Confusion on a math puzzle
I'm unsure why you calculate a "countable contribution". The key idea is that each friend has, initially, a work obligation of 1/3 of the work. The sick friend was unable to contribute as such. The …
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2
votes
Checker-board Problems
Partial:
The 4x4 can be done in
Process:
Fold bottom right to top left.
Fold top right edge to meet first vertical line from left.
Fold bottom left edge to meet first horizontal line from top.
T …
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14
votes
2
answers
6k
views
A Guide to the Number Rotation Puzzle
This is an extension of What is the strategy to solve Simon Tatham's Twiddle? in that it explicitly goes beyond the default gamemodes of Twiddle
The Number Rotation Puzzle (NRP) is a combination puzz …
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13
votes
A Guide to the Number Rotation Puzzle
I contend that no advanced mathematics was done in the process. Not a single integral or summation, and no sight of a matrix or even a group. Math doesn't have to be scary or hard. …
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4
votes
Accepted
Shortest time to meet
Now that you've specified that you want a geometric construction...
The basic idea here is that we'll flip the problem. Instead of directly constructing the point inside the triangle, we'll consider …
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11
votes
Accepted
A Guide to the Number Rotation Puzzle
This somehow became a 2019 Regeneron STS Finalist project. The intent of this answer is to provide an easy-to-follow, layman's explanation to the mechanics of the solving process.
It's been an incre …
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6
votes
Accepted
12
votes
5
answers
860
views
Can the idiot's route be less expensive than the genius' route?
(I'm assuming that the solution has some form of math so I'm tagging with mathematics. Please change if this isn't very right.) …
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17
votes
Accepted
Make numbers 1 - 32 using the digits 2, 0, 1, 7
This answer has 29 expressions with the "2017" order. Those NOT in order are denoted by sadness - :(
FOOLING AROUND (I'm simply curious about how far we can go)
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4
votes
Half the pentagon!
Building upon the "rectangle around pentagon" idea, I think I can assert that...
I have yet to do it by hand for reasons you will see, but I have basically solved this for all obtuse pentagons.
St …
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6
votes
N pirates on ship
I propse that the answer is:
Reasoning:
Simply use the same method of solving the puzzle backwards.
To review the base logic, start with $2$ pirates. In this case, the pirate proposing the distri …
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5
votes
Shortest time to meet
I'm not sure what exactly you want but here you go:
Suppose the equilateral triangle is $\triangle ABC$. Suppose further that the 5 m/s runner starts at $A$, the 4 m/s runner starts at $B$, and the 3 …
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