Top network posts
- 28 When is a sum of consecutive squares equal to a square?
- 18 How many such positions are there? (chess/math checkmate puzzle)
- 12 Two parallel lines and distance between three points on them.
- 12 Integer Sequence "sums of digits of squares".
- 11 Unique matrix of zeros and ones
- 10 proving that $OI=DE$, and proving that $OI\perp DE$
- 8 Put a mouse to the last cell
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