Wednesday, 3 June 2015

SMO 2015 (Junior Section) Answers

SMO 2015 Results

SMO 2015 Junior Questions

SMO 2015 Junior Round 2 cut off (~15)

SMO 2015 (Junior Section) Answers

1. D
2. E
3. B
4. D
5. A
6. B
7. C
8. A
9. D
10. D
11. 28
12. 40
13. 27720
14. 180
15. 4851
16. 18
17. 16
18. 42
19. 31
20. 23
21. 10002
22. 2016
23. 674
24. 6
25. 532
26. 12
27. 3
28. 1600
29. 1312
30. 9961
31. 18
32. 59
33. 12
34. 1078
35. 80 (qn is flawed, impossible scenario)

Initial answers are provided by a Year 2 NUS High student who does not wish to be named, and is different from last year's answers provider.

SMO (Junior) Previous Years' Cut-off Points (Inclusive of Round 2 scores)
2014 Scores were not revealed to schools and students
2013 Gold (27), Silver (11), Bronze (8), HM (7), Round 2 (13), Top 30 (~50)
2012 Gold (17), Silver (8), Bronze (6), HM (5), Round 2 (8)
2011 Gold (12), Silver (9), Bronze (7), HM (6), Round 2 (11), Top 30 (~34)
2010 Gold (24), Silver (9), Bronze (8), HM (5)
2009 Gold (11), Silver (7), Bronze (6), HM (5)
2008 Gold (23), Silver (14), Bronze (11), HM (10)
2007 Gold (20), Silver (14), Bronze (11), HM (10)

20 comments:

Anonymous said...

Question 19 is definitely not 217, since they ask for biggest prime number. 217 can be divided by 7. My answer is 31.

Anonymous said...

I think it's E for Q4.

Anonymous said...

yes, answer for Q19 is 31, instead of 217.

Anonymous said...

Q10.
6y^2=8x-4x^2
10x+6y^2=18x-4x^2
=-(2x-9/2)^2+81/4
Therefore the answer is 81/4.

Anonymous said...

Q28
I think that the answer should be 400.

Anonymous said...

Can somebody explain Qn 4, 17, 22, 23, 26, 28, 29, 32? Thks a lot. The paper was a headache...

Anonymous said...

What do you think would be the cut-off point for bronze this year?

Anonymous said...

What do you think would be be the cop for round 2

Anonymous said...

Around 17, I guess. Last year was 14.(This year is a lot easier) Sorry for the 2 stupid mistakes.

Anonymous said...

If I get 13 for round 1, will I get into round 2 or will I at least get a bronze/silver?

Anonymous said...

When will the results be released??

Thanh Phu Truong said...

Are all the answers here correct? Cos I get 21 points and do not know whether can get to the next round :((

William said...

I get 35 points... Not sure whether can get into second round... Feel very noob :(((

Anonymous said...

Any idea when will be results declared?

Anonymous said...

I just get 22 points, and wonder whether can into the second round. :((((

Anonymous said...

Note that if 81/4 is achieved, then x=9/4, hence 81/8+3y^2=9, so y^2=-3/8, i.e. y is not real. Hence 81/4 is wrong. The correct answer is (C) 20 since that is the largest number which yields a real value of y.
(Q10)

Anonymous said...

However equality cannot be achieved.

Anonymous said...

Hi,the namelist for SMO Round 2 is out this afternoon. The following link address shows the list of students who are invited for Junior 2nd round.

http://sms.math.nus.edu.sg/competitions/SMO2015/JuniorR2-2015.pdf

Li Hantao said...
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Li Hantao said...
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