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Problem I am facing in GMAT

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Senior Manager
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Joined: 12 Mar 2010
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Concentration: Marketing, Entrepreneurship
GMAT 1: 680 Q49 V34
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Problem I am facing in GMAT [#permalink]

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New post 24 Aug 2011, 11:29
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While solving the GMAT problems, I am facing a problem of assuming information.. For example, in the below question, it is mentioned that the increase is 'constant amount'. But when I read this question, I assumed it is constant rate of increase, and complicated a simple problem.

This happens to me in considerable number of problems in verbal and quant. Could somebody help me on how should I work on this, please?

Example Question:
when a certain tree was first planted, it was 4 feet tall & the height of the tree increased by a constant amount each year for the next 6 years. at the end of 6 year the tree was 1/5 taller then it was at the end of 4 year. by how many feet did the height of the tree increase each year
a 3/10
b 2/5
c 1/2
d 2/3
e 6/5
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Re: Problem I am facing in GMAT [#permalink]

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New post 24 Aug 2011, 19:03
supposed the first year is Xo =4
year 1 = X1= 4+a
year 2 X=4+2a.... so year 4 : X4=4+4a
year 6= 4+6a
year 6= (1/5 +1)year 4
so it should be : 4+6a=1/5(4+4a)+4+4a and you solved it and the answer is 2/3
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Re: Problem I am facing in GMAT [#permalink]

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New post 25 Aug 2011, 06:20
bsaikrishna wrote:
While solving the GMAT problems, I am facing a problem of assuming information.. For example, in the below question, it is mentioned that the increase is 'constant amount'. But when I read this question, I assumed it is constant rate of increase, and complicated a simple problem.

This happens to me in considerable number of problems in verbal and quant. Could somebody help me on how should I work on this, please?

Example Question:
when a certain tree was first planted, it was 4 feet tall & the height of the tree increased by a constant amount each year for the next 6 years. at the end of 6 year the tree was 1/5 taller then it was at the end of 4 year. by how many feet did the height of the tree increase each year
a 3/10
b 2/5
c 1/2
d 2/3
e 6/5


This question is already discussed here:
percent-increase-27208.html
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Re: Problem I am facing in GMAT   [#permalink] 25 Aug 2011, 06:20
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