Euclid Contest Preparation
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Saad

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Posted: Wed Apr 08, 2009 7:16 pm Post subject: Re: RE:Euclid Contest Preparation |
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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  |
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Analysis Mode
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Posted: Wed Apr 08, 2009 7:50 pm Post subject: Re: Euclid Contest Preparation |
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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. |
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Dark
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Posted: Wed Apr 08, 2009 8:00 pm Post subject: Re: Euclid Contest Preparation |
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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 
boooo, yeah thats what I expected though. Thanks for the reply. Why did you miss yours?
English presentation on the same morning...grr... |
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bandukda
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Posted: Thu Apr 09, 2009 1:59 pm Post subject: RE:Euclid Contest Preparation |
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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?? |
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endless

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Posted: Fri Apr 10, 2009 3:22 pm Post subject: RE:Euclid Contest Preparation |
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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. |
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Analysis Mode
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Posted: Fri Apr 10, 2009 3:32 pm Post subject: Re: Euclid Contest Preparation |
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There are 900 numbers, not 899, because the range includes 100. and it's 100<=n<=999.
it's 10/900 or 1/90. |
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endless

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Posted: Fri Apr 10, 2009 3:36 pm Post subject: Re: Euclid Contest Preparation |
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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. |
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endless

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Posted: Fri Apr 10, 2009 3:56 pm Post subject: RE:Euclid Contest Preparation |
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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
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Posted: Fri Apr 10, 2009 5:00 pm Post subject: RE:Euclid Contest Preparation |
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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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