2012 Year 9 &10 Mathematics Marathon (1 Viewer)

[Demento1]

O_O so theres no other methods to do this unless trial and error?

I call it 'systematic listing' to suit a certain case. Don't make it sound silly. Example: Draw up a table of values if that works.

 

[kazemagic]

So far, the petal question and the last two I posted all came from the same year 9 5.3 test. However, that year 9 test is easily the hardest I have ever seen and the time limit was ridiculous (45 minutes).

yea... i wonder which school...

 

[Sy123]

O_O so theres no other methods to do this unless trial and error?

I wouldnt call it trial and error simply because it only takes 1 'trial' if you know what you are doing in terms of triads

I overlooked this bit So that's why going into equations and stuff didn't work so well. Integers integers integer.

Does a math question ever include redundant information which is not necessary to like... trick someone? Like for the triangle question they could have included 12m^2 as the area but make it so that it is not necessarily required to achieve the answer, and thus your thinking would be stuffed up due to incorporating that piece of info.

In the HSC this rarely happens I would think, every hard question they give they lead you towards the answer through various parts.

Like for example in one hard end question they ask you 4 parts
you get part 1 and 2, and then use these parts to get 3, and then 4 or something like that. So in the HSC they moreso lead you onto the answer (still need to do some good thinking for the harder questions)

 

[enoilgam]

yea... i wonder which school...

Its not a high ranking selective/private school or anything. Personally, although I think this paper had some great questions, the school's maths department is pretty poor.

 

[Fawun]

Lol I didn't see it, what was your working?

THANK YOU TO THE EPIPHANY THAT I JUST HAD

I seriously haven't known how to do 1 question in this thread

i know that feel

 

[kazemagic]

I wouldnt call it trial and error simply because it only takes 1 'trial' if you know what you are doing in terms of triads



In the HSC this rarely happens I would think, every hard question they give they lead you towards the answer through various parts.

Like for example in one hard end question they ask you 4 parts
you get part 1 and 2, and then use these parts to get 3, and then 4 or something like that. So in the HSC they moreso lead you onto the answer (still need to do some good thinking for the harder questions)

lol i wud have never thought of using the triads

Its not a high ranking selective/private school or anything. Personally, although I think this paper had some great questions, the schools maths department is pretty poor.

i wonder if anyone got 100 in that

 

[enoilgam]

i wonder if anyone got 100 in that

The average was abysmal (like 15%) - to be honest, the test wasnt very well thought out. I mean, I dont mind a hard paper but this was beyond reasonable.

 

[kazemagic]

The average was abysmal (like 25%) - to be honest, the test wasnt very well thought out. I mean, I dont mind a hard paper but this was beyond reasonable.

yep even my tutor tests arent even that hard

 

[Demento1]

The average was abysmal (like 15%) - to be honest, the test wasnt very well thought out. I mean, I dont mind a hard paper but this was beyond reasonable.

I question Carrot's 3U and 4U papers.

 

[enoilgam]

yep even my tutor tests arent even that hard

The average was actually 15% (typo).

I question Carrot's 3U and 4U papers.

The thing is, carrots papers were designed specifically to be an absolute worst case scenario. Also, the difficulty was kept within reason.

 

[SpiralFlex]

Carrot's papers are definitely within reason but require deeper thinking and to catch out them rote learners. It's guided as the HSC.

 

[Demento1]

Carrot's papers are definitely within reason but require deeper thinking and to catch out them rote learners. It's guided as the HSC.

I respect the fact that he comes up with all sorts of interesting problems. It takes me days and holidays to think of like two questions - the penny dropped in one of them when I was on a ride in Seaworld.