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can anyone please explain this GMAT problem

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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Source: — Quantitative Reasoning |
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by kvcpk » Sun Aug 08, 2010 10:21 pm
sheelanadh wrote:Find the number of rectangles excluding squares from a rectangle of size 9X6.


help me please..........
Again the question is not clear. Whats the source?
Integer sides for the rectangle??
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by sheelanadh » Tue Aug 10, 2010 2:48 am
kvcpk wrote:
sheelanadh wrote:Find the number of rectangles excluding squares from a rectangle of size 9X6.


help me please..........
Again the question is not clear. Whats the source?
Integer sides for the rectangle??

question is correct...........this is from local institute....please help me to solve this problem......
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by gmatmachoman » Tue Aug 10, 2010 3:28 am
kvcpk wrote:
sheelanadh wrote:Find the number of rectangles excluding squares from a rectangle of size 9X6.


help me please..........
Again the question is not clear. Whats the source?
Integer sides for the rectangle??

Question is having big time error!
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by kvcpk » Tue Aug 10, 2010 3:28 am
sheelanadh wrote:
kvcpk wrote:
sheelanadh wrote:Find the number of rectangles excluding squares from a rectangle of size 9X6.


help me please..........
Again the question is not clear. Whats the source?
Integer sides for the rectangle??

question is correct...........this is from local institute....please help me to solve this problem......
I really doubt if this could ever be a GMAT question.
But, here's a formula to find the number of squares in a rectangle.

I have no Idea other way round.

No. of squares in a rectangle= [n(n + 1)/6]*[2n + 3t + 1]
Where n is length of shorter side.
t = difference of length between longer and shorter sides.

Here n=6, t= 9-6 =3
Hence number of squares = 6(6+1)/6 * (12+9+1)
=7 * 22 = 154

Whats the OA?
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by Ian Stewart » Tue Aug 10, 2010 3:32 am
sheelanadh wrote:
question is correct...........this is from local institute....please help me to solve this problem......
Your 'local institute' might know what the question means, but no one else will. It simply doesn't make any sense. It's barely in English for one thing, and the phrase 'Find the number of rectangles from a rectangle of size 9x6' is meaningless. The question needs to make clear not only what is being asked, but also what restrictions there are in the problem. It's unanswerable at present, except perhaps for someone with psychic abilities who can divine what the question designer had in mind here. Perhaps you can ask at the institute what the question really means, and then reply here.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

ianstewartgmat.com
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by selango » Tue Aug 10, 2010 3:46 am
Yes agree with Ian.

sheelanadh,

This is certainly not a GMAT question let alone its not a proper question at all.Just saying its from local institute is meaningless..Always use the reliable source.Just don't post the question that is not GMAT type or without any answer options.
--Anand--
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by sheelanadh » Wed Aug 11, 2010 3:59 am
kvcpk wrote:
sheelanadh wrote:
kvcpk wrote:
sheelanadh wrote:Find the number of rectangles excluding squares from a rectangle of size 9X6.


help me please..........
Again the question is not clear. Whats the source?
Integer sides for the rectangle??

question is correct...........this is from local institute....please help me to solve this problem......
I really doubt if this could ever be a GMAT question.
But, here's a formula to find the number of squares in a rectangle.

I have no Idea other way round.

No. of squares in a rectangle= [n(n + 1)/6]*[2n + 3t + 1]
Where n is length of shorter side.
t = difference of length between longer and shorter sides.

Here n=6, t= 9-6 =3
Hence number of squares = 6(6+1)/6 * (12+9+1)
=7 * 22 = 154

Whats the OA?
OA is 791.help me to solve it.....
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