Code Golf
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Joffan
  • Member for 7 years, 5 months
  • Last seen more than 5 years ago
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Interested in mathematical counting puzzles and many others ${\overset\infty \smile}$

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79
Prove that the equation $x^2-y^2 = 2002$ has no integer solution
55
How many subsets of set $\{1,2,\ldots,10\}$ contain at least one odd integer?
53
Where does the constant increase by 2 of differences between integer square values come from?
51
Every point of a grid is colored in blue, red or green. How to prove there is a monochromatic rectangle?
50
Is there a combinatorial interpretation of the triangular numbers?

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