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Alex Ravsky's user avatar
Alex Ravsky's user avatar
Alex Ravsky's user avatar
Alex Ravsky
  • Member for 5 years, 2 months
  • Last seen this week
  • Lviv, Ukraine
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A puzzle amateur.

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Top posts
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33
Unneighbourly circuit. Is there a closed rook tour on a 4x4 chessboard where the rook never moves to an adjacent square?
Apr 8
22
Which is larger? 999,999! or 2^(11!)
Nov 21, 2024
15
Make 987 using 1, 3, 5, 7, 9
Feb 20
13
The Talking Dog's Treats
Nov 24, 2024
13
What is the name of the lady with the white blouse?
Nov 30, 2024
13
123456789 = 987654321?
Jan 10
11
What are the possible triangular sums?
Nov 22, 2024
10
How is it possible that the sum of first n perfect nth powers is the current year?
Jan 23
10
Who is taller, the tallest of the shortest person in each column or the shortest of the tallest person in each row?
Feb 25
9
This is not a square
Feb 7
Top network posts
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107
How to prove every closed bounded interval in $\mathbb{R}$ is compact?
28
Graph theoretic proof: For six irrational numbers, there are three among them such that the sum of any two of them is irrational.
25
Graph theoretic proof: For six irrational numbers, there are three among them such that the sum of any two of them is irrational.
23
Do Hausdorff spaces that aren't completely regular appear in practice?
21
Integer function which takes every value infinitely often