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Jul
25
comment Probability that a stick randomly broken in two places can form a triangle
Thanks! I was about to go to sleep but then I stumbled upon your question and the opportunity to solve it and figure out the mystery was just too great to pass up. :P
Jul
25
revised Probability that a stick randomly broken in two places can form a triangle
deleted 9 characters in body
Jul
25
answered Probability that a stick randomly broken in two places can form a triangle
Jul
25
comment Your favourite maths puzzles
V pnyphyngrq gur ahzore bs cbffvovyvgvrf sbe obgu, naq vg ybbxf gb zr yvxr gurl'er gur fnzr. V'z fher gurer'f n terng rkcynangvba ohg V'z abg frrvat vg evtug abj.
Jul
25
comment Your favourite maths puzzles
Kaestur Hakarl: That's the fastest way that I know of.
Jul
25
revised Balance chemical equations without trial and error?
deleted 73 characters in body
Jul
25
comment Balance chemical equations without trial and error?
Just edited; better now?
Jul
25
revised Balance chemical equations without trial and error?
added 270 characters in body
Jul
24
awarded  Commentator
Jul
24
comment How many knight's tours are there?
Tomer Vromen: I'd repost that as an answer.
Jul
24
comment Why is the derivative of a circle's area its perimeter (and similarly for spheres)?
This doesn't explain why the coefficients match up.
Jul
24
answered Balance chemical equations without trial and error?
Jul
23
asked Counting how many hands of cards use all four suits
Jul
23
comment Your favourite maths puzzles
If the size is fixed, it's easy to create a tiling that prevents finding a monochromatic triangle, but if I remember correctly, the answer is unknown in the general case.
Jul
23
comment Your favourite maths puzzles
One answer (from Proof Without Words book): gurmeetsingh.files.wordpress.com/2008/10/calissons.png
Jul
22
awarded  Critic
Jul
22
comment Can there be two distinct, continuous functions that are equal at all rationals?
Indeed I did. Thanks for catching that!
Jul
22
revised Can there be two distinct, continuous functions that are equal at all rationals?
added 11 characters in body
Jul
22
answered Can there be two distinct, continuous functions that are equal at all rationals?
Jul
22
answered Looking for a book similar to “Think of a Number”