SMO 2016 Open Round 2 List
Cut off for Rd 2 ~13
SMO 2016 Open Questions
SMO 2016 (Open Section) Answers
1. 48
2. 6
3. 1007
4. 2145
5. 11
6. 1017
7. 9
8. 2018
9. 4032
10. 10
11. 4
12. 2
13. 946
14. 2017
15. 147
16. 4030
17. 71
18. 625
19. 48
20. 5
21. 48
22. 625
23. 100
24. 12
25. 25
For previous years' cut off points to special round, please refer to an old blog post here.
44 comments:
is the answer for 6 1017?
shouldnt the answer for 12 114?
i am doubtful about the answer for qn19
Shouldn't 8 be 2018? X can't be 1009
Isn't question 8 answer 2018, question 16 answer 8063 and question 19 answer 48?
qn16 is 4030 as the function can be (2x-1)+x(x-1)(x-2)...(x-2015)
question 8 cannot be 2019 since x cannot be 1009 but can be any integer between 0 to 2018 other than that.
Q8 is 2019.
RHS = 1
x can be any integer between 0 to 2018.
There are 2019 integer solutions.
Question 8 should be 2017, since both 1009 and 1004 are invalid.
1004 works.....
For question 12, the answer is 2 because sin x = x only if x is small and is in radians.
1004 does not work.
For q18 shouldn't the answer be 5 since 1000=8*125 so (1*3*...*2017)/1000=(1*3*...*123*127*129*...*2017)/8 which gives a remainder of 5?
Question 12 is 114, or else they won't even need a floor
Even I think so.....
What's the predicted cut-off this year? I think this year is harder...
1*3*5*...*2017 is congruent to 0 (mod 625) and 1*3*...*2017 is congruent to 1 (mod 8). Therefore 5 cannot be the answer as it is absurd
It isn't particularly hard so the cutoff would be the usual 11-12 points.
Normally when will the second round cutoff be publicized?
Can anyone tell me how to do question 13? I wrestled with this question but still cannot come up with an answer
Really?Do you think the cutoff will be lower than 2015 and 2013?
I think it is quiet time-consuming so I skipped it without hesitation during the exam.
what is this year's difficulty like compared to 2013 and 2015?
Reply:Really?Do you think the cutoff will be lower than 2015 and 2013?
So how many do u get correct?
14
24C3 = 2024
Number of ways where b=d=(a+c)/2 is 2(12C2)=132
(2024-132)/2!=946
By the way, speaking of time consuming, do you know how to do question 19?
Yes,question 19 is quiet simple.Use Pythagoras theorm twice and you can get the answer
I think the one involving Pythagoras theorem is question 20. Question 19 is the one involving the product of two fractions
My apology! I confused question 19 with 21. Notwithstanding,I work out 19 as well.I would like to share you with my solution.Can I have your email or you prefer me posting it here?
My email is unturnedskittlespony@gmail.com
Just sent you the solution.
U got the invitation right...
Yes,I do.But do you know what is the cutoff?
Invitation? For round 2?
Correct.
Are you in SIMO team ?
Reply to:Yes,I do.But do you know what is the cutoff?
Dun know,but how many do u get correct?
The results are out already?
How did you know the results?
Click on the "Round 2 List" just above the answers
What is SIMO...?
A little above the cutoff
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