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If 5w + 3v = 13, what is the value of vw ? (1) w > 0 (2)

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Manager
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If 5w + 3v = 13, what is the value of vw ? (1) w > 0 (2) [#permalink] New post 03 Feb 2007, 18:31
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If 5w + 3v = 13, what is the value of vw ?

(1) w > 0

(2) w/v = 1/2


Here is a DS question from a PR CAT. It appears simple enough, but I have a question based more on form than substance. I'll wait for everyones answers to see if my question is answered.

Thanks,
Manager
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 [#permalink] New post 03 Feb 2007, 18:46
Opps,

I made a bonehead mistake on this, so my question is cleared up. Anyways, feel free to post answers. Although I think this is WAY below the level of this board.

Thanks,
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 [#permalink] New post 03 Feb 2007, 22:49
If 5w + 3v = 13, what is the value of vw ?

(1) w > 0

(2) w/v = 1/2

from stem v,w could be itnigers or not , fractions and +ve or -ve or any could = zero

from one

w is +ve

w = 13/5 , v = zero or w= 2 , v = 1 or w = 16/5 , v = -1..........insuff

from two

w/v is in the ratio of 1:2 and both have the same sign

w = x and v = 2x

subistitute in stem
5x+6x = 13 thus x = 1 and vw = 2.......suff

my answer is B
Senior Manager
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Re: DS from PR Test [#permalink] New post 04 Feb 2007, 20:47
bz9 wrote:
If 5w + 3v = 13, what is the value of vw ?

(1) w > 0

(2) w/v = 1/2



Question: 5w + 3v = 13 Thus w = (-3v + 13)/5, wv = ?

(1) w > 0, v have oo value. INSUFF

(2) v = 2w

w = (-3*2w + 13)/5

clearly there is one answer for w. and one answer for v. we know wv. SUFF

B. is the answer
Manager
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 [#permalink] New post 09 Feb 2007, 20:05
Sorry for the delay, but B is the OA.

I got this really easy question wrong because I tried to read the question too fast and as a result forgot about 5w + 3v = 13.

I need to slow it down.

Thanks,
  [#permalink] 09 Feb 2007, 20:05
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If 5w + 3v = 13, what is the value of vw ? (1) w > 0 (2)

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