通常第六题是最难的
botong
2009-07-26 09:25:21
( reads)
You can check the statistics:
http://imo-official.org/year_country_r.aspx?year=2009
In this year, 6 people in the chinese team only got 11 pts for problem 6 (7 pts each person if correctly solved). That means that no one solved it (averagely).
Most countries got zero in problem 6. Japan got highest in problem 6. But it was still just 19 for 6 persons to share.