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Mathematics
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arax
  • Member for 11 years, 2 months
  • Last seen more than a month ago
  • Beijing, China
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97
Should I put number combinations like 1111111 onto my lottery ticket?
Aug 14, 2013
29
How to verify if a curve is exponential by eyeballing?
Jan 12, 2017
12
2D Rubik's cube?
Apr 11, 2014
11
Is it possible that a clock's three hands divide the clock face into 3 equal parts?
May 21, 2013
9
How to calculate the integral of $x^x$ between $0$ and $1$ using series? [duplicate]
Jun 1, 2013
7
The distance between the origin and all intersections by the diagonals of a regular polygon
Aug 10, 2015
6
How to find the CDF of the binomial distribution in terms of an integral
Jan 2, 2014
5
Number Theory: $x^2+y^2=a^2$
May 13, 2013
4
How to maximize the expected number of corrected guesses?
Mar 14, 2019
4
Kaprekar's constant is 6174: Proof without calculation
Sep 16, 2013
Top network posts
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18
How can I determine whether the mass of an object is evenly distributed?
15
Is frequency quantized in the black body spectrum?
14
Asking a cafe/restaurant if they have Wi-Fi *and* electricity for using a device
14
Fastest way to sum the upper triangle
10
What does 二货朋友 mean?