Tuesday, 31 May 2011

SMO 2011 (Senior Section) Answers

SMO 2011 Senior Special Round Participants List
1. B
2. A
3. D
4. C
5. E
6. A
7. E
8. B
9. A
10. C
11. 400
12. 12
13. 14
14. 300
15. 8001
16. 1006
17. 54
18. 1005
19. 1011
20. 1
21. 40
22. 3
23. 93
24. 1120
25. 1
26. 180
27. 9
28. 28
29. 168
30. 276
31. 20
32. 5
33. 61
34. 45 (correct answer is 16, as in solution book)
35. 12
*Correct answers to Qn. 29 and Qn. 35 are provided by goran.

National Average Statistics

SMO (Senior) Previous Years' Cut-off Points (Inclusive of Round 2 scores)
2010 Gold (26), Silver (10), Bronze (7), HM (6)
2009 Gold (19-23), Silver (10), Bronze (7), HM (6)
2008 Gold (27-28), Silver (15), Bronze (10), HM (9)
2007 Gold (29-30), Silver (16), Bronze (12), HM (10)

Update:
2011 Gold (21), Silver (15), Bronze (10), HM (9), Cut-off for Round 2: about 15, Cut-off for Top 30: about 27
My Score: 28+50
at

7 comments:

  1. anonym- -31 May 2011 at 18:59

    - -for 28 I think it's 28
    when n(first number in the series)=6 33=3*11.. and the four primes are 5 11 3 11
    but when n=8 5*7=35 .. 5 11 5 7

    It's awesome that you manage to get all the answers within one and a half hours after the test..

    I only filled in 22 blanks and I found out 2 at least of them are wrong now..

    The most annoying thing for today's test was for Qn30 I calculated 2^2*5^2=1000 and didn't examine.. so at last I wrote 1176 on it > <

    May I know why Qn.17 is 54? Thanks..

    Googled here..

    ReplyDelete
  2. Anonymous31 May 2011 at 21:23

    oi you damn 大胆 leh

    ReplyDelete
  3. Anonymous6 June 2011 at 11:03

    I thought the answer for Q10 is D.

    ReplyDelete
  4. Hi6 June 2011 at 17:45

    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=150&t=410064

    ReplyDelete
  5. Charlie13 June 2011 at 22:35

    I'm sorry if i'm asking nonsensical question, but can anyone help me explain question 8? i know it is the easiest question in the paper, but i counldn't find out where's my careless mistake... thanks and sorry for the trouble :)

    ReplyDelete
  6. Charlie13 June 2011 at 23:39

    My answer for question 8 is (E) by the way.

    ReplyDelete
  7. 2011 senior special rd26 June 2011 at 15:44

    Round 2
    Qn 1
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=47&t=414417
    (or disprove?) is not in the original qn

    Qn 2
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=57&t=414419

    Qn 3
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=38&t=414420

    Qn 4
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=42&t=414421

    Qn 5
    http://www.artofproblemsolving.com/Forum/viewtopic.php?f=52&t=414422

    ReplyDelete