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D01-45

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D01-45 [#permalink] New post 23 Jul 2012, 08:12
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Hi GMATers

5 boxes are placed in a stack by weight from lightest to heaviest. The heaviest box weighs x kg and then next heaviest weighs x less than the heaviest box and the next heaviest box weighs x−x less than the next heaviest, and so on. If the heaviest box weighs 10kg, approximately what percent less weight is the lightest box than the heaviest one? 30 40 50 60 70

Has anyone else had difficulty with this question and it's explaination? Rephrasing the question we're told that the heaviest box = x kgs, and x = 10. The second heaviest box weighs x less, which to me means x-x kgs, or 0 kg.

Also, in the explaination it's hard to follow the order of the deductions because the second heavies box is listed as x-x whilst the others are listed numerically.

I wonder if there is a missing x/10 somewhere, or perhaps its implied and I've missed it.
Interested in your thoughts

B.
[Reveal] Spoiler: OA

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Re: D01-45 [#permalink] New post 23 Jul 2012, 08:24
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bradfris wrote:
Hi GMATers

5 boxes are placed in a stack by weight from lightest to heaviest. The heaviest box weighs x kg and then next heaviest weighs x less than the heaviest box and the next heaviest box weighs x−x less than the next heaviest, and so on. If the heaviest box weighs 10kg, approximately what percent less weight is the lightest box than the heaviest one? 30 40 50 60 70

Has anyone else had difficulty with this question and it's explaination? Rephrasing the question we're told that the heaviest box = x kgs, and x = 10. The second heaviest box weighs x less, which to me means x-x kgs, or 0 kg.

Also, in the explaination it's hard to follow the order of the deductions because the second heavies box is listed as x-x whilst the others are listed numerically.

I wonder if there is a missing x/10 somewhere, or perhaps its implied and I've missed it.
Interested in your thoughts

B.


This question will be removed from the tests soon, so I wouldn't worry about it at all.
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Re: D01-45   [#permalink] 23 Jul 2012, 08:24
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