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 Euclid Contest Preparation
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Saad




PostPosted: Wed Apr 08, 2009 7:16 pm   Post subject: Re: RE:Euclid Contest Preparation

endless @ Wed Apr 08, 2009 12:03 pm wrote:
so are we aloud to talk about it yet


No. Please refrain until at least midnight of today which makes it one completed day minimum. Thanks Smile
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Analysis Mode




PostPosted: Wed Apr 08, 2009 7:50 pm   Post subject: Re: Euclid Contest Preparation

Did badly, messed up 5b, 6b, 7a, 7b, 9a, 10a (and I did know how to do all of them). Other than those, i did (successfully) 1,2,3,4,5a,6a.

MAde more mistakes than last year.
Dark




PostPosted: Wed Apr 08, 2009 8:00 pm   Post subject: Re: Euclid Contest Preparation

smoovee @ Tue Apr 07, 2009 6:38 pm wrote:
Dark @ Tue Apr 07, 2009 6:19 pm wrote:
Nope, they give out a printout of the contest I believe, so it wouldn't be fair to the first students who wrote it. I wish I could've wrote it Sad


boooo, yeah thats what I expected though. Thanks for the reply. Why did you miss yours?


English presentation on the same morning...grr...
bandukda




PostPosted: Thu Apr 09, 2009 1:59 pm   Post subject: RE:Euclid Contest Preparation

do u guyz have ny idea watz the min score required to achieve a scholarship at Waterloo??
because I dont think I'll get nything more than 65 or 70 atmost.. :p
It was a tough paper nd I spent around 20 min solving 8a buh didnt make it..
iz there nyone who did 8a??
endless




PostPosted: Fri Apr 10, 2009 3:22 pm   Post subject: RE:Euclid Contest Preparation

so i guess we can talk about details now.
what did you guys get for the integer n where 100<n<999 sum of digits is 24?

i got 10/899, but probabilities aren't my forte, so wanting to know if i made a stupid mistake.
Analysis Mode




PostPosted: Fri Apr 10, 2009 3:32 pm   Post subject: Re: Euclid Contest Preparation

There are 900 numbers, not 899, because the range includes 100. and it's 100<=n<=999.

it's 10/900 or 1/90.
endless




PostPosted: Fri Apr 10, 2009 3:36 pm   Post subject: Re: Euclid Contest Preparation

Analysis Mode @ Fri Apr 10, 2009 3:32 pm wrote:
There are 900 numbers, not 899, because the range includes 100. and it's 100<=n<=999.

it's 10/900 or 1/90.


lol, ouch. i had a feeling that i got that wrong, but by that time i was doing quick answers for the short answers, and trying to scribble stuff down for the long answer questions i hadn't done yet.
endless




PostPosted: Fri Apr 10, 2009 3:56 pm   Post subject: RE:Euclid Contest Preparation

so how did you guys do 6. b), the physics question?

the closest i got was carrying v on the distance through until it cancelled out, but my answer was unrealistic.
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CodeMonkey2000




PostPosted: Fri Apr 10, 2009 5:00 pm   Post subject: RE:Euclid Contest Preparation

You know GF is 45km (60*45/60), so let t be the time the two took to intersect, and x be Bob's speed. You know that x*t=45 and 60t+45=45+20/60x (total distance traveled). You have 2 equations, so solve for x, which is 90km/h
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