User mjqxxxx - Mathematics Stack Exchange

mjqxxxx

Member for 12 years, 11 months
Last seen this week

816 Answers

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63 votes

'Obvious' theorems that are actually false

answered Jun 4, 2014 at 18:07

43 votes

Accepted

Gödel's ontological proof

answered Jan 26, 2013 at 8:22

42 votes

Accepted

What is the millionth decimal digit of the $ 10^{10^{10^{10}}} $-th prime?

answered Oct 28, 2011 at 18:19

39 votes

Accepted

Mathematician vs. Computer: A Game

answered Oct 27, 2014 at 16:46

30 votes

Probability of winning a game by rolling the die first

answered Feb 23, 2022 at 17:54

29 votes

A 20+ year old combinatorial problem - the cookie game

answered Feb 18, 2013 at 23:28

27 votes

Accepted

Is half a pie as big as a whole pie?

answered Feb 11, 2014 at 16:30

27 votes

Accepted

Iterated exponent of $i$

answered Aug 23, 2012 at 7:12

25 votes

Accepted

Number of zero digits in factorials

answered Jan 25, 2013 at 22:41

25 votes

Inverse of the sum of matrices

answered Jan 16, 2011 at 21:02

25 votes

Finding Value of the Infinite Product $\prod \Bigl(1-\frac{1}{n^{2}}\Bigr)$

answered Jan 19, 2011 at 18:31

23 votes

Guessing a subset of $\{1,...,N\}$

answered Mar 6, 2011 at 15:38

22 votes

Accepted

Intuition about infinite sums

answered Sep 14, 2016 at 13:00

20 votes

Accepted

Conjectured closed form for $\int_0^1x^{2\,q-1}\,K(x)^2dx$ where $K(x)$ is the complete elliptic integral of the 1ˢᵗ kind

answered Nov 22, 2013 at 20:55

18 votes

Accepted

Random Walk Without Repetitions

answered May 6, 2015 at 19:20

18 votes

Accepted

1D random walk-probability to go back to origin

answered Jan 18, 2011 at 18:24

18 votes

incremental computation of standard deviation

answered Jan 27, 2012 at 15:37

17 votes

Accepted

Searching for rock-hard integers.

answered Jan 14, 2020 at 3:47

17 votes

Are the integers closed under addition... really?

answered Jan 10, 2014 at 22:43

17 votes

How many lists of 100 numbers (1 to 10 only) add to 700?

answered Sep 10, 2014 at 17:01

16 votes

Expected value in coin flipping process

answered Jul 21, 2022 at 17:14

16 votes

Accepted

Is the solution to this holiday puzzle unique?

answered Dec 12, 2011 at 19:57

15 votes

Accepted

Number of roots of $x^a-1=0$ with $a \in \mathbb{C}$

answered Mar 22, 2011 at 18:06

14 votes

Bijection between an open and a closed interval

answered Mar 23, 2011 at 2:18

14 votes

Is there a bijection between $(0,1)$ and $\mathbb{R}$ that preserves rationality?

answered Jan 15, 2011 at 15:58

14 votes

Accepted

Solving a Nonlinear Recursion

answered Jul 16, 2012 at 22:23

13 votes

How can I prove my conjecture for the coefficients in $t(x)=\log(1+\exp(x)) $?

answered Feb 19, 2013 at 18:53

13 votes

Accepted

Find $x$ from $3^x\cdot x^3 = 1$

answered Dec 27, 2012 at 19:20

13 votes

Accepted

A question about series with a strange property.

answered Jan 6, 2013 at 7:24

13 votes

Accepted

Using the rules that prove the sum of all natural numbers is $-\frac{1}{12}$, how can you prove that the harmonic series diverges?

answered Jan 12, 2015 at 6:04

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