2012 Year 9 &10 Mathematics Marathon (4 Viewers)

[Fawun]

What why is everyone so smart.

Niqqa, that's what i'm suppose to be saying.

 

[Verify]

I'm losing hope.

 

[enoilgam]

I'm losing hope.

Why?

 

[SpiralFlex]

Young ones if you spend time investing in your interests, you will always get something in return + interests

If you plant the seed, water it and take care of it, you will get a harvest.

 

[Fawun]

Young ones if you spend time investing in your interests, you will always get something in return + interests

If you plant the seed, water it and take care of it, you will get a harvest.

Yeah well i try to do maths and I get nothing in return except marks reading 7/20!

 

[SpiralFlex]

Yeah well i try to do maths and I get nothing in return except marks reading 7/20!

Because you don't have heart/consistency/invested time

Without struggle there is no progress young Fawn

 

[enoilgam]

Because you don't have heart/consistency/invested time

Without struggle there is no progress young Fawn

I disagree - I think fawun has all of these things. I think she needs a better teacher and better instruction.

 

[SpiralFlex]

I disagree - I think fawun has all of these things. I think she needs a better teacher and better instruction.

Fair enough.

 

[Demento1]

None of that registered in my brain

but then again it's 1AM and who the hell is thinking about maths at 1AM?

Fawun just saying, go on skype. I'll give you the easiest way to get that answer that I found. We're talking about that petal question from Enoilgam right?

 

[Fawun]

Fawun just saying, go on skype. I'll give you the easiest way to get that answer that I found. We're talking about that petal question from Enoilgam right?

Can you pm me? I'm on my phone and it doesnt have skype lol

 

[Demento1]

Can you pm me? I'm on my phone and it doesnt have skype lol

I'll send it later tonight. Got some homework to catch up on, music examinations next Saturday and I'm writing up a maths exam currently.

 

[HSC2014]

*Reposting question for others who might want to find petal question
http://community.boredofstudies.org/attachment.php?attachmentid=26350

Fawun, here's a hint. The area of the shaded parts is 100(the square) - (the middle of the petals) - (the corner of the boxes), which should be pretty straight forward. Your goal in this case is to find the middle and the corners' areas.

 

[ganji]

Cheers have fun (thought last question referred to all of the nonshaded instead of within the box...
bad wording of question tbh) gl fawun

solutions:

 

[hamster-lol]

Cheers have fun (thought last question referred to all of the nonshaded instead of within the box...
bad wording of question tbhView attachment 26519

You could make the observation that the area of the white outer is equal to the area of the white inner.

 

[hamster-lol]

If you know probability, here is a question I posted in the year 11 marathon.

a) Let

This is expressed in ascending order. By considering in descending order show that



b) Consider a bag. This bag has every single letter of the alphabet in it, and only one of each letter so that there are 26 letters in the bag. Let the probability of picking the letter 'z' out of the bag be

Now consider another bag, called bag 2. This bag contains 1 A, 2 B's, 3 C's, and so on, up to 26 Z's.

Show that none of the letters in bag 2 have the same probability of being pulled out as

 

[ganji]

Lol i know, i was just doing proper solutions so it looks easier to read... if you get what I mean xD so people actually get what is happening.

 

[ganji]

Here is an interesting question from my maths olympiad. Hint: think about patterns, fairly straightforward once you get it

A positive integer is said to be partitioned if expressed in the form n = x₁ +x₂ + ... +x_k,
where k >= 1 and each of x₁, x₂, ... , x_k is a positive integer. Assuming that order is
signicant (so that, for example, 1 + 2 and 2 + 1 are dierent partitions of 3), determine
in terms of n the number of ways of partitioning n.

 

[kazemagic]

If you know probability, here is a question I posted in the year 11 marathon.

a) Let

This is expressed in ascending order. By considering in descending order show that



b) Consider a bag. This bag has every single letter of the alphabet in it, and only one of each letter so that there are 26 letters in the bag. Let the probability of picking the letter 'z' out of the bag be

Now consider another bag, called bag 2. This bag contains 1 A, 2 B's, 3 C's, and so on, up to 26 Z's.

Show that none of the letters in bag 2 have the same probability of being pulled out as

GG, just replace "a" with "1" and "d" with "n"

 

[Demento1]

GG, just replace "a" with "1" and "d" with "n"

LOL, please ban kazemagic - he be cheating. Also, was this question legit in the AMO? I don't recall it being this recent.

 

[Fawun]

kaze thinks he's fully taboulli