GMAT Diagnostic Test Question 45

hey guys,
I havent done a CAT exam yet, is this really a 750 level question?

is there any way to reduce the time spent on the calculations ? any technique for faster or more elegant calculation ?

"x - x%" makes no sense, you cannot substract percents from kilograms. This formula taken aside, the tests are really helpful , thanks guys!

I saw this question in the new GMAT club test, which doesn't have % signal, making the question very akward:
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?
Please correct the question poll, Admin.

5 boxes are in a stack by weight from lightest to heaviest. The heaviest box weighs x kg and then nextheaviest weighs x less than the 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?

A 30
B 40
C 50
D 60
E 70

The question is as it appeared in my test.
I was unable to understand the question - what is it trying to say

From where did you got this problem. you seem to type wrong.
x - x = 0, then weight is 0

This question is removed from the tests. So, don't worry about it.

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.

Same question without % sign appeared in a test ( D01-45) for me as well.

Please correct it.

Is there a formula-based method for something like this? I solved it by calculating each weight individually, but wouldn't want to get stuck with an exam question that asks for weight of 10th box, or 30th box. Or would be beyond the scope of the GMAT?

This question was removed from the tests. So, I wouldn't worry about it at all.

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