Carl Löndahl
  • Member for 6 years, 7 months
  • Last seen more than a month ago
2 answers
11 votes
412 views
A curious circuit
2 answers
10 votes
888 views
Bouncing ball on a billiard board
1 answers
12 votes
382 views
Fitting the pieces
3 answers
9 votes
392 views
A problem of inequalities