Carl Löndahl's user avatar
Carl Löndahl's user avatar
Carl Löndahl's user avatar
Carl Löndahl
  • Member for 8 years, 3 months
  • Last seen more than a month ago
12 votes
1 answer
399 views

Fitting the pieces

11 votes
2 answers
435 views

A curious circuit

10 votes
2 answers
962 views

Bouncing ball on a billiard board

9 votes
3 answers
413 views

A problem of inequalities