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Top Questions
21 votes

Guaranteed Checkmate with Rooks in High-Dimensional Chess

combinatorics geometry puzzle recreational-mathematics combinatorial-game-theory asked Jun 8 '12 at 20:35
math.stackexchange.com

20 votes

Evaluating $\sum\limits_{n=1}^{\infty} \frac{1}{n\operatorname{ GPF}(n)}$, where $\operatorname{ GPF}(n)$ is the greatest prime factor

real-analysis sequences-and-series analytic-number-theory asked Feb 5 '12 at 8:01
math.stackexchange.com

18 votes

Math without infinity

soft-question infinity asked Jul 10 '11 at 11:52
math.stackexchange.com

17 votes

Self-avoiding walk on $\mathbb{Z}$

number-theory sequences-and-series graph-theory recurrence-relations asked Feb 20 '12 at 19:01
math.stackexchange.com

16 votes

A double sum $\sum \limits_{n=1}^{n=\infty}\left(\sum \limits_{k=n}^{k=n^2}\frac{1}{k^2}\right)$

sequences-and-series convergence asked Nov 4 '11 at 20:07
math.stackexchange.com

14 votes

Primes sum ratio

prime-numbers analytic-number-theory asked Oct 1 '11 at 10:09
math.stackexchange.com

13 votes

True vs. Provable

logic incompleteness asked Oct 2 '11 at 21:49
math.stackexchange.com

13 votes

Slowing down divergence 2

sequences-and-series convergence asked Nov 15 '11 at 9:28
math.stackexchange.com

13 votes

Solution in integers to $2^n+n=3^m$

number-theory elementary-number-theory diophantine-equations asked Jun 1 '12 at 15:04
math.stackexchange.com

12 votes

Can chess simulate a Universal Turing Machine?

computability turing-machines board-games halting-problem recreational asked Oct 11 '11 at 21:27
cstheory.stackexchange.com

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Top Answers
22
Swatting flies with a sledgehammer
math.stackexchange.com

10
Why are “heavier” particles harder to detect than “lighter” ones?
physics.stackexchange.com

10
Can magnets rotate infinitely?
physics.stackexchange.com

10
Great unsolved physics problems
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10
Can pure maths create new theories in physics or does the “idea” ALWAYS come before the math?
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9
Why does the cart move?
physics.stackexchange.com

8
Is the set of all mathematical truths countable or uncountable?
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8
What interesting open mathematical problems could be solved if we could perform a “supertask” and what couldn't?
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8
Home experiments to derive the speed of light?
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7
Both solutions to a quadratic make sense — looking for applications
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7
Cooling a cup of coffee with help of a spoon
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6
Can a function “grow too fast” to be real analytic?
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6
What happens to an astronaut who's floating in a spaceship (in space) when it begins to move?
physics.stackexchange.com

6
Brachistochrone Problem for Inhomogeneous Potential
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5
Why do mathematicians use single-letter variables?
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5
How to prove existence of solutions without constructing one?
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5
Does $4x^2+1=5^y$ have a solution in integers with $y>1$?
math.stackexchange.com

5
what are the zeroes of $\sqrt{z}$?
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5
What does the optical zoom in telescopes do?
physics.stackexchange.com

5
What does it take to become a top physicist?
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5
Electric Potential
physics.stackexchange.com