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UKMT Maths Senior Challenge 2015

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Reply 20

NotNotBatman

Original post by Christoph987

did anyone else find Q9 incredibly strange, the one about intersecting lines on a piece of paper.

I thought that was pretty straight forward.

Reply 21

Messier31

Don't discuss specific questions or the thread will be locked.

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Reply 22

swagmister

Some people are saying it was easier the last year some harder, overall do people think the thresholds will be high lower or similar to last years?

Reply 23

ComputerMaths97

I think the Gold-Olympiad range will be wider than normal... There were about 15 easy questions and about 10 much harder ones IMO.

Reply 24

Akashi

Original post by Christoph987

even without the use of identical lines, unless you assume each line continues infinitely then the question is impossible.

Yup, got stuck at that point so then I started doodling thinking of possibilities and did other weird things like find maximum possible intersections and find factors etc etc

Reply 25

gomc

Original post by Akashi

Yup, got stuck at that point so then I started doodling thinking of possibilities and did other weird things like find maximum possible intersections and find factors etc etc

please stop discussing answers as the thread will be locked - the other thread for this got locked earlier today

Reply 26

ETbuymilkandeggs

I realized that, even if I got all of my answers correct, I still wouldn't have enough marks to qualify for the BMO. It's all good though; I just wanted something to supplement my PS if I get a silver or above. I never had the intention to go further in the first place.

Also, nobody in my maths class could confidently answer the first question. Is it me, or was it quite straightforward? All you had to do was assign a 'variable' to a certain 'value' and then it was simple algebra (purposely being vague because of the 'no answer' rule)

(edited 8 years ago)

Reply 27

Magnesium

Original post by Christoph987

even without the use of identical lines, unless you assume each line continues infinitely then the question is impossible.

I thought this too. They didn't seem to specify whether they were equal length or whether they continued infinitely!

Reply 28

Messier31

Original post by NotNotBatman

It was a bit easier than last year I only answered about 14 questions, because I ran out of time. I think that I got 12 right and 2 wrong; this should mean I would get 71, which would have got me a silver last year, but I'm pretty sure that it would get me a bronze this year.

Also, I tend to find the questions from 20-25 much easier than the questions 10-19, anyone else?

I wouldn't say the last few questions are easier but I get what you're saying. I sometimes struggle with the early ones :lol:

I also felt this years challenge was a bit easier but that could be because we're older and better at maths than we were.

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Reply 29

marioman

Original post by ETbuymilkandeggs

Also, nobody in my maths class could confidently answer the first question. Is it me, or was it quite straightforward? All you had to do was assign a 'variable' to a certain 'value' and then it was simple algebra (purposely being vague because of the 'no answer' rule)

Yeah Q1 was pretty standard for the SMC, harder than last year's first question though which was just 98 * 102.

Reply 30

DavidBick

Do you guys think 98 will be enough to qualify for the BMO? Given this test was a little harder than last years? Thanks

Reply 31

lewis1008

Original post by jack.123765

Did anyone do the challenge today? How did you find it?

I did it and found that it was alright and was fairly enjoyable to do

Reply 32

Emmz62

Original post by gomc

please stop discussing answers as the thread will be locked - the other thread for this got locked earlier today

Do you know when we can discus the answers????

Reply 33

Messier31

Original post by Emmz62

Do you know when we can discus the answers????

By tomorrow morning I'd presume considering the answers are out at 9:00

Reply 34

LoveToArgue

the only reason I did this the maths challenge was to get out of an english timed essay, so I don't really care what I get, seeing as I've already achieved gold in junior, intermediate and senior! Tbh I had a nice hour and a half solving some mathematical logic problems

Reply 35

Pronged Lily

Original post by Magnesium

I thought this too. They didn't seem to specify whether they were equal length or whether they continued infinitely!

Yeah, and "on a flat piece of paper" even seems to suggest that they aren't, since paper isn't generally infinitely large... xD

Reply 36

Emmz62

Original post by Messier31

By tomorrow morning I'd presume considering the answers are out at 9:00

Where do we get the answers from tomorrow? will they be online

Reply 37

Magnesium

Original post by Pronged Lily

Yeah, and "on a flat piece of paper" even seems to suggest that they aren't, since paper isn't generally infinitely large... xD

Exactly! But then I was like 'hold up, if they're all made xcm long, they can have all of the intersection points they listed!" That question baffled me :tongue: