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GMATPrep1 Number line - fastest way to solve?

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by smehmood » Fri Aug 15, 2008 2:03 pm
What is the fastest way to solve Q1 of the attached? I solved it by drawing
a number line but it took quite some time.

How can we solve Q2 of the attached?

Thanks
M
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Source: — Data Sufficiency |
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by pepeprepa » Fri Aug 15, 2008 3:10 pm
1)
I think the way to draw a line is fine, it is a tool which helps you to see the problem, I don't think there is a "method" for this question.

2)
450y=n^3
9*5*10*y=n^3
3^2*5^2*2*y=n^3
The minimum value of y for n an integer is: y=3*5*4

Therefore, I would answer I only
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by smehmood » Fri Aug 15, 2008 4:05 pm
Thanks. I'm just curious which book/material did you studied (that you think) helped you in solving the 2nd question?
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by pepeprepa » Sat Aug 16, 2008 12:10 am
You can find some of this type of exercice in OG but the forum has much more exercices like that.
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by sumithshah » Sat Aug 16, 2008 11:25 am
Do you feel like giving the OA's to each question?

Thanks
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by gmattester » Thu Aug 21, 2008 8:51 am
What are the OA for these 2 questions.
Is it A, A
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by smehmood » Fri Aug 22, 2008 11:15 am
Sorry I didn't get it. What is an OA?
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by sumithshah » Fri Aug 22, 2008 11:25 am
You posted the question - shouldn't you know the OA?
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by sumithshah » Fri Aug 22, 2008 11:26 am
Ah - just realized what you asked - sorry for the previous post

OA is Official Answer ( or Obvious Answer - for those who prefer to be cocky) - basically, the answer to the question.

Thanks
Sumit
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by smehmood » Sat Aug 23, 2008 12:39 pm
"E" is the correct answer or OA.
M
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by kv_ajay » Sat Aug 23, 2008 11:24 pm
[quote="smehmood"]"E" is the correct answer or OA.
M[/quote]

I m not sure how the answer would be E...
May be i am getting something wrong here...

I would draw this as below:
From question:
A-------------18---------B
C------------8----------D
From 1
A--d?-9------C----9---d?-B
From 2)
A-----D
So combining 1 and 2
A-1-D----8----C---9-----B

So in this case answer would be C. Why the answer is E ?
Anyone ?
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