# Search results

2. ### Some Questions from AIMO 2009

Here are two questions which I'm stuck on. You might like to have a go, and perhaps post the solutions. 8. In ∆ABC, angle ABC = 138° and angle ACB = 24°. Point D is on AC so that angle BDC = 60° and point E is on AB so that angle ADE = 60°. If angle DEC = x°, find the value of x. 9. Let...
3. ### Answers to 2009 AMC

These are official, courtesy of the Australian Mathematics Trust.
4. ### Factorials? Induction?

Can anyone do anything with this? Simplify: n x (n – 1) x (n – 2) x ... x k x ... x 3 x 2 x 1 ----------------------------------------------------- (n – k + 1) x (n – k) x ... x 3 x 2 x 1 Thanks...
5. ### A Newton's Method Question

I'm working on this question at the moment. It can be done by using Newton's method. A tank in the shape of a swiss cross is made from steel less than 3 cm thick. All external dimensions are exactly 1 metre. If it takes 4000 litres of fluid to fill the tank to 100 mm from the top, what is...
6. ### Debating

For those who are remotely interested, I discovered the dates for next year's ISDA debating on the website: http://www.isdadebating.info/draw/2009draw.html
7. ### Stupid Americans

We know that the literacy level of people that live in the US is not all that high. Why are people talking about either Obama or McCain as the 44th President when they will only be the 43rd? In other words, there have only been 42 presidents, including the current one. Or have I missed one?
8. ### Answers to General Maths Exam

2008 GENERAL MATHS HSC EXAM SECTION I 1. A 2. C 3. A 4. D 5. B 6. B 7. D 8. C 9. A 10. D 11. B 12. A 13. C 14. B 15. B 16. D 17. A 18. A 19. B 20. D 21. B 22. C SECTION II QUESTION 23 (a) (i) Feb, Mar, Nov or Dec (ii) Nov (b) 0.4% (c) (i) 20.625 mL (ii) 3.9...
9. ### 4 unit HSC from 1979

Came across this exam paper while going through a dusty cardboard box. Some of the questions are no longer in the course, but some are worth having a try. See how you go.
10. ### Answers to 2008 AMC

Courtesy of Australian Mathematics Trust.
11. ### Answers to General Maths Exam

For those interested ... Double checked a few of them. Let me know of any errors. In any case, it's done now. Move on to the next exam or if you've finished, have a drink for me! SECTION I 1. B 2. A 3. D 4. A 5. C 6. A 7. D 8. C 9. A 10. B 11. B 12. C 13. C 14. B 15. A 16. D 17. C 18. C 19. A...
12. ### AIMO Question which is bugging me

Find x + y where x and y are non-zero solutions of the system of equations: y2x = 15x2 + 17xy + 15y2 x2y = 20x2 + 3y2 I'm fairly sure the solution is x=19 and y=95. Just don't know how to get there.
13. ### What Debating Competitions are you involved in?

Hi everyone, I was wondering if you could help me out with a small survey? I'd like to find out what debating competitions students themselves actually enter. While schools enter plenty of competitions, I'd like to find out what competitions students personally do themselves. (If you know...

15. ### Answers to General Maths Exam

Hi everyone, These are just the answers. I'll to post worked solutions later. Sorry for the delay. There's now a rule which says that teachers can get the papers 2 hours after starting. Last year it was 30 minutes. Anyway ... for the record ... Section I 1. A 2. D 3. B 4. C 5. B...
16. ### 2006 CSSA Trial and Answers

Hi everyone. Here is this year's Catholic Trial paper. I've replaced the fancy front page with something boring to make the file size quite small. In all other respects it is the original paper. And I've also included the Answers to the paper - NOT worked solutions. Hope this helps...
17. ### Answers to 2006 Australian Maths Competition

These are the official answers, courtesy of the Australian Mathematics Trust. Answers only, not solutions. ... if you're interested.
18. ### General Maths Tutoring in the City/East/North Shore

If you're after a tutor for General Maths this year, if you're in Year 11 or in Year 12, then get in touch. I'm in the Eastern Suburbs, and can travel to City, North Shore, South-East or Inner West. I charge \$60 per hour. I know - seems expensive - but what do you get for you \$\$\$? Well I'm...
19. ### Worked Solutions

For those that are interested... Seriously though, it's over. Get on with life. See you at the pub!