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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, 1 month
  • Last seen more than 1 year ago
12 votes
1 answer
405 views

Fitting the pieces

11 votes
2 answers
441 views

A curious circuit

10 votes
2 answers
991 views

Bouncing ball on a billiard board

9 votes
3 answers
414 views

A problem of inequalities