Steven Stadnicki's user avatar
Steven Stadnicki's user avatar
Steven Stadnicki's user avatar
Steven Stadnicki
  • Member for 13 years, 8 months
  • Last seen this week
  • Seattle, WA
128 votes

Does the square or the circle have the greater perimeter? A surprisingly hard problem for high schoolers

118 votes

In the history of mathematics, has there ever been a mistake?

107 votes

Can a piece of A4 paper be folded so that it's thick enough to reach the moon?

93 votes

The Mathematics of Tetris

74 votes
Accepted

if there are 5 points on a sphere then 4 of them belong to a half-sphere.

60 votes

In calculus, which questions can the naive ask that the learned cannot answer?

58 votes

Why can ALL quadratic equations be solved by the quadratic formula?

58 votes
Accepted

Origin of the dot and cross product?

55 votes
Accepted

A (probably trivial) induction problem: $\sum_2^nk^{-2}\lt1$

48 votes
Accepted

Koch snowflake paradox: finite area, but infinite perimeter

45 votes

Multiple-choice question about the probability of a random answer to itself being correct

38 votes
Accepted

Which is bigger: $9^{9^{9^{9^{9^{9^{9^{9^{9^{9}}}}}}}}}$ or $9!!!!!!!!!$?

38 votes
Accepted

What is this pattern called?

38 votes

How many digits does the integer zero have?

35 votes

How can I write the numbers 5 and 7 as some sequence of operations on three 9s?

34 votes
Accepted

Why can't polynomials have negative exponents or division by a variable

34 votes
Accepted

Can Mickey Mouse divide by $7$?

33 votes
Accepted

Questions on a self-made theorem about polynomials

33 votes
Accepted

Proof that $\sin10^\circ$ is irrational

30 votes

How to force prime numbers into a line?

29 votes

Is it true to say that "it's not logically possible to prove something can't be done"?

29 votes

Is this of any real importance to the mathematical scientific community?

29 votes

If $a^3 b = ba^3$ and if $ a $ has order 7, show that $ab = ba$

29 votes

Hole inside cube with tetrahedrons at corners?

27 votes
Accepted

Why does the Fibonacci Series start with 0, 1?

27 votes

What are some examples of notation that really improved mathematics?

25 votes

Is there a statement whose undecidability is undecidable?

24 votes

Why is it harder to prove which integers are sums of three squares rather than sums of two squares or four squares?

24 votes

Is $\sum_{n=1}^{+ \infty}\left(\frac {1}{n}-\frac{1}{p_n}\right)$ convergent?

22 votes

Intuitive understanding of why the sum of nth roots of unity is $0$

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