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WildBobAA
Old 11-21-2006, 12:41 AM     Post subject: Simple Math Question WTF #1 (permalink)  
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So I'm taking the GRE (Graduate Record Examination) tomorrow and I'm looking over some practice questions. One of them has been driving me crazy.

Stan drove for h hours at a constant rate of r miles per hour. How many miles did he go during the final 20 minutes of his drive?

A. 20r
B. hr/3
C. 3rh
D. hr/20
E. 3r

Isn't the answer r/3???? WTF am i retarded?
 
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Pelion
Old 11-21-2006, 12:44 AM #2 (permalink)  
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r/3

the questions borked
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WildBobAA
Old 11-21-2006, 12:44 AM #3 (permalink)  
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Thank God
 
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martindcx1e
Old 11-21-2006, 03:56 AM #4 (permalink)  
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ya it's pretty easy to see that the answers are stupid:

say he was going 100mph for 1 hour. so he traveled how many miles in 20 mins? EDIT: The correct calculation should give us 33.33 miles.

A. 2000 miles
B. 1/3 of a mile
C. 300 miles
D. 1/20 of a mile
E. 300 miles
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givememyleg
Old 11-21-2006, 03:57 AM #5 (permalink)  
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ensign_lee
Old 11-21-2006, 03:58 AM #6 (permalink)  
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It should be r/3 logically. Now, let's see the damn answer choices.

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givememyleg
Old 11-21-2006, 04:00 AM #7 (permalink)  
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 wtf isnt it B?

ps im no good at math

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Old 11-21-2006, 04:04 AM #8 (permalink)  
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Quote:
Originally Posted by givememyleg
wtf isnt it B?
no. he didn't go 1/3 of a mile in 20 mins if he was going 100mph.
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a500lbgorilla
Old 11-21-2006, 10:55 AM #9 (permalink)  
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Quote:
Originally Posted by givememyleg
wtf isnt it B?

ps im no good at math
B gives you how much he traveled during the last 1/3rd of his trip.

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DaNutsInYoEye
Old 11-21-2006, 10:58 AM #10 (permalink)  
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I remember the GRE being rediculously easy.
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nickthefool
Old 11-21-2006, 11:02 AM #11 (permalink)  
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B is correct if h = 1.

D is correct if h = 20/3.

The others are all incorrect unless r = 0
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Lukie
Old 11-21-2006, 11:34 AM     Post subject: Re: Simple Math Question WTF #12 (permalink)  
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Quote:
Originally Posted by WildBobAA
am i retarded?
yes
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thenonsequitur
Old 11-21-2006, 12:28 PM     Post subject: Re: Simple Math Question WTF #13 (permalink)  
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Quote:
Originally Posted by WildBobAA
One of them has been driving me crazy.
So if you're going crazy for h hours at a rate of r, how crazy will be after the real GRE?
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swiggidy
Old 11-21-2006, 05:21 PM     Post subject: Re: Simple Math Question WTF #14 (permalink)  
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Quote:
Originally Posted by thenonsequitur
Quote:
Originally Posted by WildBobAA
One of them has been driving me crazy.
So if you're going crazy for h hours at a rate of r, how crazy will be after the real GRE?
ha

@dixie: B is still wrong, eh.

h= 1
r = 100

h * r / 3 = 33.3

Also the units are wrong
A. mph
E. mph
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WildBobAA
Old 11-21-2006, 05:34 PM #15 (permalink)  
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h and r aren't units, they are variables

hr = h*r, not hours
 
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swiggidy
Old 11-21-2006, 06:12 PM #16 (permalink)  
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Quote:
Originally Posted by WildBobAA
h and r aren't units, they are variables

hr = h*r, not hours
h and r are variables with units

h: hours
r: miles/hours

h*r: hours * miles / hours = miles
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WildBobAA
Old 11-21-2006, 06:19 PM #17 (permalink)  
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hmm

fuck this question
 
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thenonsequitur
Old 11-21-2006, 06:23 PM #18 (permalink)  
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Quote:
Originally Posted by swiggidy
h: hours
r: miles/hours
Actually r and h are both unitless, as per the question definition.

"Stan drove for h hours at a constant rate of r miles per hour."

If they had units the quesiton would be stated as:

"Stand drove for h at a constant rate of r".

The answer should be unitless too, because the quesiton was:

" How many miles ... ?"

If the answer was supposed to have units the question would be:

"How far ... ?"


Of course, this is just me being nitpicky. I understand exactly where you're coming from, that even if the variables are unitless, you have to manipulate them while keeping in mind the units they were originally attached to.
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chardrian
Old 11-21-2006, 06:35 PM #19 (permalink)  
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B.
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come check out my training videos at pokerpwnage.com
 
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swiggidy
Old 11-21-2006, 06:43 PM #20 (permalink)  
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Quote:
Originally Posted by thenonsequitur
Actually r and h are both unitless, as per the question definition.

"Stan drove for h hours at a constant rate of r miles per hour."
You in mathematics or philosophy?
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drmcboy
Old 11-21-2006, 07:12 PM #21 (permalink)  
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WildBobAA
Old 11-22-2006, 02:37 AM #22 (permalink)  
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Well i got a 770/800 on the quantitative part and 440/800 on the verbal part. fuck speaking
 
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martindcx1e
Old 11-22-2006, 03:50 AM #23 (permalink)  
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words are overrated
Wikipedia is the best thing ever. Anyone in the world can write anything they want about any subject. So you know you are getting the best possible information.
 
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thenonsequitur
Old 11-22-2006, 04:19 AM #24 (permalink)  
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Quote:
Originally Posted by WildBobAA
Well i got a 770/800 on the quantitative part and 440/800 on the verbal part. fuck speaking
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swiggidy
Old 11-22-2006, 05:35 AM #25 (permalink)  
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Quote:
Originally Posted by WildBobAA
Well i got a 770/800 on the quantitative part and 440/800 on the verbal part.
Congrats.

Quote:
Originally Posted by WildBobAA
fuck speaking
QFT

This kid in my graduate lab from China said he got a 780 on the verbal. He knew the definitions of all these words I have never heard of. Yet he couldn't write a sentence to save his life.
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thenonsequitur
Old 11-22-2006, 03:36 PM #26 (permalink)  
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One of my roommates took the GRE a little while ago and got 790 on her verbal and 740 in quantitative. The verbal makes sense--she is a writer, currently works at a publishing company, and majored in a writing-related field as an undergrad.

But she doesn't have any idea how that 740 in happened. Her claim is that if she, who dislikes math and is not great at it, can get a 740 in quantitative section, then the future of engineering must be pretty glum.

Also, she likes to use this fact to help demonstrate how the GRE is overall a badly designed test whose results can only be very loosely correlated with a person's knowledge and skills.
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swiggidy
Old 11-22-2006, 08:35 PM #27 (permalink)  
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Quote:
Originally Posted by thenonsequitur
Also, she likes to use this fact to help demonstrate how the GRE is overall a badly designed test whose results can only be very loosely correlated with a person's knowledge and skills.
I don't think anyone would debate this. The average for engineers is 780 I believe. The math concepts are below high-school calculus.
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