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x and y are expressed as decimals.

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Manager
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x and y are expressed as decimals. [#permalink] New post 10 Jul 2014, 08:32
x and y are expressed as decimals. When (x+y) is rounded to the hundredth place, it is equal to x.

(1) x
(2)0.007

A) (1) is bigger
b) (2) is bigger
c) (1) and (2) are equal
d) Relationship can't be determined

I don't seem to understand how to go about cracking this question.

Thanks
K
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Re: x and y are expressed as decimals. [#permalink] New post 11 Jul 2014, 00:28
I don't believe that such q's appear on GMAT.
What is the source ?
Intern
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Re: x and y are expressed as decimals. [#permalink] New post 12 Jul 2014, 03:21
This a GRE question . Quantitative comparison
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Manager
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Kudos [?]: 3 [0], given: 11

Re: x and y are expressed as decimals. [#permalink] New post 12 Jul 2014, 15:19
Yeah, it's GRE question. I am looking for a way to solve it; any help is greatly appreciated.
Ciao!
K
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Joined: 28 Dec 2013
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Kudos [?]: 14 [0], given: 18

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x and y are expressed as decimals. [#permalink] New post 12 Jul 2014, 15:48
Ok . I would go with option D .
Cause they have just mentioned dat x and y are decimals.
We do not know whether they are positv negative . Either which way let us take a few cases .

Case 1 :
If x = 0.007 and y = 0.0001
-》 x + y = 0.0071
X + y rounded to the hundredth placs it gives 0.007 which is x
Hence x = 0.007
You can choose option (C)

Case 2 :
X = 0.006 and y = 0.0001
X+y = 0.0061
Rounded off gives 0.006 which is = x
Hence you could choose option (B)

With jus two cases we get varying answers.

So we need more info to know what precise values of x and y are we allowed to take .

Hence d qns would be option (D)

Hope dis helped.

Kudos plz if it did :D
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Re: x and y are expressed as decimals. [#permalink] New post 14 Jul 2014, 09:40
Hi Janxavier,

thank you!
Re: x and y are expressed as decimals.   [#permalink] 14 Jul 2014, 09:40
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