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Simple Math Question WTF

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  1. 11-20-2006 08:41 PM #1
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    Default Simple Math Question WTF

    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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  2. 11-20-2006 08:44 PM #2
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    r/3

    the questions borked
    gabe: Ive dropped almost 100k in the past 35 days.

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  3. 11-20-2006 08:44 PM #3
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    Thank God
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  4. 11-20-2006 11:56 PM #4
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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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  5. 11-20-2006 11:57 PM #5
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    oops
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  6. 11-20-2006 11:58 PM #6
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    It should be r/3 logically. Now, let's see the damn answer choices.

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  7. 11-21-2006 12:00 AM #7
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    wtf isnt it B?

    ps im no good at math
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  8. 11-21-2006 12:04 AM #8
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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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  9. 11-21-2006 06:55 AM #9
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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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  10. 11-21-2006 06:58 AM #10
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    I remember the GRE being rediculously easy.
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  11. 11-21-2006 07:02 AM #11
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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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  12. 11-21-2006 07:34 AM #12
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    Default Re: Simple Math Question WTF

    Quote Originally Posted by WildBobAA
    am i retarded?
    yes
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  13. 11-21-2006 08:28 AM #13
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    Default Re: Simple Math Question WTF

    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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  14. 11-21-2006 01:21 PM #14
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    Default Re: Simple Math Question WTF

    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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  15. 11-21-2006 01:34 PM #15
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    h and r aren't units, they are variables

    hr = h*r, not hours
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  16. 11-21-2006 02:12 PM #16
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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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  17. 11-21-2006 02:19 PM #17
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    hmm

    fuck this question
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  18. 11-21-2006 02:23 PM #18
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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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  19. 11-21-2006 02:35 PM #19
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  20. 11-21-2006 02:43 PM #20
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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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  21. 11-21-2006 03:12 PM #21
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    backpack in Europe instead.
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  22. 11-21-2006 10:37 PM #22
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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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  23. 11-21-2006 11:50 PM #23
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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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  24. 11-22-2006 12:19 AM #24
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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
    lnaagueag non eedeedt.
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  25. 11-22-2006 01:35 AM #25
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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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  26. 11-22-2006 11:36 AM #26
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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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  27. 11-22-2006 04:35 PM #27
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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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