Carl Löndahl's user avatar
Carl Löndahl's user avatar
Carl Löndahl's user avatar
Carl Löndahl
  • Member for 7 years, 8 months
  • Last seen more than a month ago
12 votes
1 answer
394 views

Fitting the pieces

11 votes
2 answers
422 views

A curious circuit

10 votes
2 answers
946 views

Bouncing ball on a billiard board

9 votes
3 answers
408 views

A problem of inequalities