Australian Maths Competition (4 Viewers)

[kurt.physics]

Re: How did people go in the maths comp today?

For the map question I got the option where the 3rd letter is W. Besides that I can't remember

Yeh, that (E).

 

[Official]

Re: How did people go in the maths comp today?

Yeh, that (E).

Okay, glad I got the right answer

 

[kurt.physics]

Re: How did people go in the maths comp today?

Okay, glad I got the right answer

same! That question was annoying! I looked at the clock and i was like, theres no way i am going to be folding paper when i have 9 questions left, so i just folded the paper in my head =)

 

[Hypermelon]

Re: How did people go in the maths comp today?

i just used the second picture
labelled it and drew some arrows
i got e too

 

[kurt.physics]

Re: How did people go in the maths comp today?

I thought that question number 15 (intermediate) was a bit hard for a question 15, it was



I got it only using modular arithmetic, but compared to last year q 15 its pretty hard. There is also the pattern of the question 21 in the intermediate papers being ridiculous and completely irrelevant (last years was Farmer Taylor blah blah) and this years was the map =Z

 

[Hypermelon]

Re: How did people go in the maths comp today?

i was surprised at the position of the map question..

 

[Official]

Re: How did people go in the maths comp today?

I thought that question number 15 (intermediate) was a bit hard for a question 15, it was



I got it only using modular arithmetic, but compared to last year q 15 its pretty hard. There is also the pattern of the question 21 in the intermediate papers being ridiculous and completely irrelevant (last years was Farmer Taylor blah blah) and this years was the map =Z

I would have done it by finding a pattern since I don't know any advanced method

Corresponding last digits of various powers to 8
8^1 = 8
8^2 = 4
8^3 = 2
8^4 = 6
8^5 = 8

By this, we find that the last digit repeats every 4 powers
8^2009 = 8

And 8 * 6 = 8

 

[nerdsforever]

Re: How did people go in the maths comp today?

map question was Q20. 4 marks

Were any of the questions from Q21-25, (c) by any chance? (from the senior paper)
I guessed (c)for a lot them.

 

[Official]

Re: How did people go in the maths comp today?

map question was Q20. 4 marks

Were any of the questions from Q21-25, (c) by any chance? (from the senior paper)
I guessed (c)for a lot them.

Q. 23 was definitely 4, I'm not sure if that is (c) or (d)

 

[nerdsforever]

Re: How did people go in the maths comp today?

what do you think 60 points would get me?

 

[gurmies]

Re: How did people go in the maths comp today?

Official, what did you (or anyone else doing the Senior paper) get for the question with n-fold composites?

 

[nerdsforever]

Re: How did people go in the maths comp today?

yay! I put 4 for Q23. It was (d). but were there any answers that were (c) by any chance?

 

[Official]

Re: How did people go in the maths comp today?

Official, what did you (or anyone else doing the Senior paper) get for the question with n-fold composites?

Eh, which question is that? Can't remember

 

[kurt.physics]

Re: How did people go in the maths comp today?

I would have done it by finding a pattern since I don't know any advanced method

Corresponding last digits of various powers to 8
8^1 = 8
8^2 = 4
8^3 = 2
8^4 = 6
8^5 = 8

By this, we find that the last digit repeats every 4 powers
8^2007 = 8
8^2008 = 4
8^2009 = 2

And 2 * 6 = 2

So I'm guessing its 2, am I correct?

Sorry, its 8. I can show you my solution if you want.

 

[Official]

Re: How did people go in the maths comp today?

Sorry, its 8. I can show you my solution if you want.

Oh ok, my mistake then. What did you do to get 8?

Edit: My bad, made an error in the working lol, it is now corrected. Yeah, it is 8

 

[gurmies]

Re: How did people go in the maths comp today?

It was like: Let f(x) = (x+6)/x and fn(x) = f(f(...

 

[Official]

Re: How did people go in the maths comp today?

yay! I put 4 for Q23. It was (d). but were there any answers that were (c) by any chance?

Can't remember, I remember guessing C for 25 or something though lol

what do you think 60 points would get me?

Probably Distinction, or if the test was hard you can scrape in a High Distinction . Last year, I remember the HD cut off being 64 in the Intermediate Division.

 

[Jeee]

Re: How did people go in the maths comp today?

I paid for it, and completely forgot about it! Argh.

 

[Official]

Re: How did people go in the maths comp today?

It was like: Let f(x) = (x+6)/x and fn(x) = f(f(...

Oh I didn't get that one, I guess (c) though. Was that one of the questions 24 or 25?

 

[Timothy.Siu]

Re: How did people go in the maths comp today?

anyone know the answer to 28,29 or 30?