SMO 2018 Junior Rd 2 Namelist

Junior Round 2 Cut-off: 16

SMO 2018 Junior Rd 2 Questions

SMO 2018 Junior Questions

SMO 2018 (Junior Section) Answers

1. E

2. B

3. D

4. C

5. B

6. 100

7. 11

8. 180

9. 3003

10. 810

11. 54

12. 5200

13. 550

14. 904

15. 90

16. 35

17. 1440

18. 3200

19. 20800

20. 2

21. 9

22. 25249

23. 568

24. 90

25. 1009

## 82 comments:

how do u get the ans for q25

how is q25 1009

Considering x terms,

1 - (1-x) + (1-x)^2 - (1-x)^3 + (1-x)^4 - ... - (1-x)^2017

= x - 2x + 3x - 4x + ... + 2015x - 2016x + 2017x + ...

Coefficient of x

= 1 - 2 + 3 - 4 + ... + 2015 - 2016 + 2017

= 1008(-1) + 2017

= 1009

Why is there 25 qns this year?

Any idea what may be the cut off score this year?

Why is 54 the answer for question 11?

somebody say, cut off : 12--13

Is 16 enough for gold?

This year's paper is much more easier, which includes many primary school questions. Personally I think. And the format changed

The format had changed

how many questions must we get correct for bronze/silver/gold

How much do you think we'll need to get gold?

I got 20 out of 25 for the first round but then my coach said i might not make the second round.

yes, much easier and longer time for each try. 21 as cut off point will not be surprise.

Some questions were doable, some were hard

thanks yall for making me look like an idiot :') i probably got like 6

Is 10 enough for honourable mention?

Guys I need your help. Is 16 to 17 enuf for silver?

Will they be more lenient in this time’s grading system? Coz I think there are fewer choices of questions to choose from, which means that the paper is more difficult the scope is narrower.

Guys what rank is 15???

Hi guys, is 16 enough for Round 2/ Gold?

Everyone who goes to round 2 is guaranteed silver, and in order to get gold you must get into round 2 and do well in it I think.

Wait if we can get 15 can we get into the second round. My friend said the cut-off should be about 10-15, but I am not sure. How am I supposed to know?

Guys I got like 6 will that get me into round 2? I really want top 30

I think that is participation tbh

Is 20 enough for round 2??

Will 10 get me a silver? I want to get into 2nd round badly...

Is 12 enough for a bronze?

I would estimate the round 2 cut-off to be around 17-18 probably

@anon who got 6 yeah u round 2 and gold.

What'll be the cutoff point for this year? I got 21/25...not sure if that's enough...I know people who got 24...

How do u get ans for q12?

This years paper was very easy. I checked my answers and I think that I got 25/25

What is the total mark required to get top 30 ... special round seems very difficult

Will 15 get me a sliver?I really want to get top 30

I checked my answers and I think that I got 15/25. Is it enough for a bronze?

I got around 12 correct.. would that get me at least a bronze?

Is 20 enough for round 2? Primary 6 here.

Q12 is not 5200.Let the total number of phone is p.

We have: 1800=200*(p-2)-m/p

=>1800=200p-400-m/p

=>2200=200p-m/p

=>p>=2200/200=11

In other way, m is smallest so p is also smallest.

If p=11 => we have: 2200=2200-m/11

=>0=0-m/11

=>m=0

But m cannot be 0 so species

If p=12 => we have: 2200=2400-m/12

=>0=200-m/12

=>m/12=200

=>m=2400

Thus the smallest value of m is 2400

p is a prime

is ten enough for a award?

what will 14 get me?

14 will get you bronze to silver. Likely bronze.

Can anybody help me with qn 18 ? Its pretty confusing

News!! SMO ROUND 2 RESULT CAME OUT!! CHECK EMAIL AND WITH YOUR RESPECTIVE SCHOOLS!!! I got 20/25 and got in round 2!! Can someone say how much they get so we know the COP?

Hello, are the round 2 namelist out online already?

If so, can you send me the link to the name list?

Cutoff should be about 15. Anyone getting below 15 and got into round 2?

16/25 here.... chances of getting into R2? I understand I'm treading on a tightrope (between getting and not getting into R2) here....

Have yet to receive email although nobody I know has, even those with >18 questions correct... is there perhaps a namelist you can share?

i have got the list of 2nd round participant, it is given via email. i can try to find your name if you give your initial name. only 230 names on my list

Is it ok to just send the list so everyone can check themselves?

hey justyn, what were you wrote before? haha, congrats btw! how many questions you got right?

Are there any Chung Cheng High Main winners?

Yes, only one. entry number 18 : Young Y H

@ Justyn, for question number 18, just make a line from D to C, after that you can solve it using area of triangle. -Hd

Will the list of round 2 participants be posted here?

https://goo.gl/zh9jf4

R2 list for your reference (I suppose there are no inaccuracies)

Cutoff this year should have been 16 - I'm the 16/25 boy (refer to comment on 11 June at 2203) and I know people with 15/25 who are not in R2

Any idea how many people participated? I wanna know what is the percentage cutoff for round 2 participants.

Top 10% in R2 so ~2300 ppl

Does the list provided only contain of Sec 1s?

Do u have senior and open lists

Results out at SMS website:

Junior http://sms.math.nus.edu.sg/Competitions/SMO2018/R2Junior-2018.pdf

Senior http://sms.math.nus.edu.sg/Competitions/SMO2018/R2Senior-2018.pdf

Open http://sms.math.nus.edu.sg/Competitions/SMO2018/R2Open-2018.pdf

Good lucks to all...

Yes I think the list only contains of Sec 1s

is 10-11 enough for bronze?

I got 25/25; I got into Second Round.

I got selected for Round 2

Congrats!

question 1 of round 2 is recycled from past year.

What is the answer for Question 2 of SMO round 2?

I think Q2 of SMO round 2 is 14√2

By hypothesis, it's easy to prove that ABC is an equilateral triangle

No its 14

You have to use similarity laws making triangle ABC similar to triangle BCD to find BD as square root of 196 so BD = 14

Can someone share the Round 2 answers. I felt it was a bit too hard.

Was it too hard? It was actually easier than last year IMO

I believe the answers are somewhere along these lines

1. (8,1), (4,4), (0,7)

2. 14

3. 1023 (on hindsight I believe it is 2047 or 2048)

4. 130

5. 5-12, 14

Can someone check? Thanks in advance

I think I got like 39

Is it good?

wow, 39? is that your score on 2nd round only? and will the result from previous round get added to my score on the round 2? i think i got 30 for 2nd round and 20 from the first round. how much more point usually needed on the 2nd round to get gold? i think that 2nd round question from previous year is almost impossible to answer by normal student,only this year that's really easy

Yes 39 out of 50 on round 2

Hi guys, what do you think is the mark for top 30, like 50/ 75???

Hi guys, when are the round 2 results going to be out? I want to know how I did>

@piauw

1:yes

2:yes

3:how did you get 1023!?!?! I got 23... like firstly, both sides cannot be even

Obviously first case is 1

Then next using my poor logic, I found that for the greatest common divisor=1, one side must be prime numbers >50 (eg 1x47) other side is 100!/47, the greatest common divisor will be 47 even though it is prime because 47x2=94 is there and 94 can divide by 47...

So cases is 11 primes >50 times 2(53 and 53x1) + original 1 case

4:they asked for the integers... not how many...

5: you said pentagon can be made but interior angle of pentagon is 108.. how do you make 108 with 60 and 90 only?

Anyway I am just stupid boy correct me because I sure as hell 99% am wrong

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