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Empy2
  • Member for 9 years
  • Last seen this week
  • Adelaide, Australia
25 votes
1 answer
782 views

Fibonacci-related sum

14 votes
1 answer
730 views

Narcissistic numbers in other bases

9 votes
1 answer
461 views

Guess the number of a liar

9 votes
1 answer
175 views

Binomial sum gives $4^n$

8 votes
2 answers
1k views

Rearrangement of dinner guests

7 votes
1 answer
208 views

How many ways to reach an integer by addition and multiplication

5 votes
1 answer
84 views

Sum of factors from consecutive sequence

5 votes
1 answer
4k views

Number of normals from a point to an ellipse

4 votes
2 answers
583 views

Circumradius of a tetrahedron

4 votes
0 answers
151 views

$Z_n \backslash \{0\}$ splits into octets

4 votes
0 answers
407 views

Split $\{1,2,...,3n\}$ into triples with $x+y=4z$

3 votes
0 answers
126 views

Hypercube bisector: Does this alternating sum have a limit?

3 votes
1 answer
409 views

Version of Fitch Cheney's card trick

3 votes
1 answer
111 views

What is the dimension of this fractal curve?

3 votes
1 answer
179 views

How fast does $f_n = \sin f_{n-1}$ approach zero? [duplicate]

3 votes
0 answers
107 views

Typical dimension of eigenspace

3 votes
2 answers
161 views

Lowest score never made

3 votes
2 answers
245 views

seventeen tiles on a torus

2 votes
1 answer
150 views

Average number of $U[0,1]$ random numbers to reach $x$

2 votes
1 answer
94 views

Numbers not of the form $x^2+My^2$

2 votes
0 answers
139 views

Smallest prime p with N a quadratic residue mod p

2 votes
0 answers
417 views

Square pairs in other bases

2 votes
0 answers
74 views

Coloring of small chessboards on the torus

2 votes
1 answer
83 views

Armstrong numbers in base 90

2 votes
0 answers
110 views

Chessboard four-colour theorem

1 vote
1 answer
87 views

Size of a subset of $\mathbb{N}$

1 vote
2 answers
134 views

Split $\{1,...,3n\}$ into triples with $x+y=5z$ - no solutions?

1 vote
2 answers
137 views

Pointless probability

1 vote
1 answer
40 views

Cubic with turning point near zero

1 vote
1 answer
155 views

A game theory question about tiles, part 2