Carl Löndahl
  • Member for 6 years, 8 months
  • Last seen more than a month ago
1 answers
12 votes
383 views
Fitting the pieces
2 answers
11 votes
412 views
A curious circuit
2 answers
10 votes
889 views
Bouncing ball on a billiard board
3 answers
9 votes
395 views
A problem of inequalities