Wednesday, 1 June 2011

SMO 2011 (Open Section) Answers

SMO 2011 Open Special Round Participants List
1. 1080
2. 300
3. 8
4. 10
5. 1
6. 8748
7. 27
8. 504
9. 71
10. 8
11. 38
12. 1936
13. 10
14. 50
15. 34220
16. 32
17. 6029
18. 2112
19. 6034
20. 95004
21. 48
22. 8
23. 38
24. 30
25. 2

National Average Statistics

SMO (Open) Previous Years' Cut-off Points (Inclusive of Round 2 scores)
2010 Gold (38), Silver (9), Bronze (6), HM (5)
2009 Gold (27-29), Silver (9), Bronze (6), HM (5)
2008 Gold (27), Silver (11), Bronze (10), HM (6)
2007 Gold (19-20), Silver (9), Bronze (6), HM (5)

Update:
2011 Gold (18), Silver (9), Bronze (6), HM (5) Cut-off for Round 2: 9
My Score: 23+50
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12 comments:

  1. Anonymous1 June 2011 at 20:00

    aiyahyahyah i put 720 for first qn

    ReplyDelete
  2. Anonymous1 June 2011 at 23:10

    how come number one not 720

    ReplyDelete
  3. Anonymous1 June 2011 at 23:39

    Because the frame of reference is also rotating

    ReplyDelete
  4. Liu2 June 2011 at 00:18

    This comment has been removed by the author.

    ReplyDelete
  5. Liu2 June 2011 at 00:21

    If the two coins are perpendicular to each other, may the answer be 720?

    ReplyDelete
  6. XenoQuatz2 June 2011 at 08:37

    for first question you have to remember that it is not on a flat plane but a 360 degrees arch (in other words a circle) so you have to add 360 degrees to whatever answer obtained if the coin is rolling on a flat plane

    ReplyDelete
  7. Anonymous3 June 2011 at 10:21

    For question 22, isn't the answer 9 instead of 8? My combination was 1!+2!+3!=3^3 And therefore x+y+z=3+3+3=9.

    ReplyDelete
  8. Anonymous3 June 2011 at 18:12

    To Anonymous above,
    1!+2!+3!=9 but 3^3=27 they are not equal. It is 3^2.
    x+y+z=3+3+2=8

    Lim Min

    ReplyDelete
  9. Hi8 June 2011 at 17:16

    Some of the solutions of the SMO (open) section can be seen at:


    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=150&t=409741&p=2300694#p2300694

    ReplyDelete
  10. SMO 2011 Open Special Round3 July 2011 at 06:23

    Qn 1.
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=47&t=416050

    Qn 2.
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=42&t=416051

    Qn 3.
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=52&t=416052

    Qn 4.
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=57&t=416053

    Qn 5.
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=57&t=416054

    ReplyDelete
  11. Anonymous22 May 2012 at 20:55

    This paper is retarded

    ReplyDelete
  12. Anonymous13 December 2020 at 19:01

    Erm so for qn 2 if we look the distance wouldnt change if we shifted it from 300 to 200 hundred right? the question asked for the minimum distance travelled in toal and 100*200+200*0+300*100=100*300+200*100+300*0=50,000?

    ReplyDelete