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Still in progress! Sharing collection of DS questions posted

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Senior Manager
Senior Manager
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Status: Not afraid of failures, disappointments, and falls.
Joined: 20 Jan 2010
Posts: 290

Kudos [?]: 267 [0], given: 260

Concentration: Technology, Entrepreneurship
WE: Operations (Telecommunications)
GMAT ToolKit User Premium Member
Still in progress! Sharing collection of DS questions posted [#permalink]

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New post 18 Mar 2010, 12:36
Still in progress!
Sharing collection of DS questions posted on forums. File will be updated whenever new questions are added.

Hope it's useful to all of you guys!
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DS questions posted on Forums_in progress_18-03-2010.pdf [155.54 KiB]
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_________________

"I choose to rise after every fall"
Target=770
http://challengemba.blogspot.com
Kudos??

Kudos [?]: 267 [0], given: 260

Senior Manager
Senior Manager
User avatar
Status: Not afraid of failures, disappointments, and falls.
Joined: 20 Jan 2010
Posts: 290

Kudos [?]: 267 [0], given: 260

Concentration: Technology, Entrepreneurship
WE: Operations (Telecommunications)
GMAT ToolKit User Premium Member
Re: DS questions posted on Forums [#permalink]

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New post 20 Mar 2010, 16:50
sidhu4u wrote:
Thanks...

You are welcome, will share whatever I'll collect or have (legal stuff :))
Guys! Where are kudos? hehe :) (kidding)
_________________

"I choose to rise after every fall"
Target=770
http://challengemba.blogspot.com
Kudos??

Kudos [?]: 267 [0], given: 260

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Joined: 26 Mar 2010
Posts: 46

Kudos [?]: 10 [0], given: 5

Re: DS questions posted on Forums [#permalink]

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New post 29 Mar 2010, 05:07
Thanks a lot- appreciate it.

Kudos [?]: 10 [0], given: 5

1 KUDOS received
Senior Manager
Senior Manager
User avatar
Status: Not afraid of failures, disappointments, and falls.
Joined: 20 Jan 2010
Posts: 290

Kudos [?]: 267 [1], given: 260

Concentration: Technology, Entrepreneurship
WE: Operations (Telecommunications)
GMAT ToolKit User Premium Member
Re: DS questions posted on Forums [#permalink]

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New post 29 Mar 2010, 16:40
1
This post received
KUDOS
yayy! got 1 kudos :)
_________________

"I choose to rise after every fall"
Target=770
http://challengemba.blogspot.com
Kudos??

Kudos [?]: 267 [1], given: 260

Intern
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Joined: 11 Apr 2011
Posts: 32

Kudos [?]: 3 [0], given: 3

Location: London
WE 1: 3 yrs f/t manager in aerospace (IT - Commercial - Int'l Mktg)
WE 2: 5 yrs freelance consultant to Gov't
Re: DS questions posted on Forums [#permalink]

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New post 23 Apr 2011, 08:48
Hi :) Great compilation!

Later on in the document you cover

Quote:
If n and y are positive integers and 450Y = n^3, which of the following must be an integer?
I. y/(3 x 2^2 x 5)
II. y/(3^2 x 2 x 5)
III. y/(3 x 2 x 5^2)
a. None
b. I only
c. II only
d. III only
e. I, II, and III


and ask about relating it to the explanation on the following page.... you're quite right, the answer on the following page does not relate to the question! :)

[Reveal] Spoiler:
The answer option 'B' is quite correct, but the way this is explained is as follows:

450 = 2 * 3^3 * 5^2

if (2* 3^3 * 5^2 )*y = n^3, what we really need for an integer answer is for the left hand side of this equation to all be powers of three.

we already have 2^1, so y needs to contain 2^2 as a factor... we also have 5^2, so y needs to contain 5^1 as a factor as well. The only answer that satisfies both requirements is answer I, making B the correct choice.

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Re: DS questions posted on Forums   [#permalink] 23 Apr 2011, 08:48
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