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Carl Löndahl's user avatar
Carl Löndahl's user avatar
Carl Löndahl's user avatar
Carl Löndahl
  • Member for 9 years
  • Last seen more than 1 year ago
10 votes
2 answers
989 views

Bouncing ball on a billiard board

11 votes
2 answers
441 views

A curious circuit

12 votes
1 answer
405 views

Fitting the pieces

9 votes
3 answers
414 views

A problem of inequalities