Still in progress! Sharing collection of DS questions posted : GMAT Quantitative Section
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Still in progress! Sharing collection of DS questions posted

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Senior Manager
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Still in progress! Sharing collection of DS questions posted [#permalink]

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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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Kudos??

Senior Manager
Status: Not afraid of failures, disappointments, and falls.
Joined: 20 Jan 2010
Posts: 294
Concentration: Technology, Entrepreneurship
WE: Operations (Telecommunications)
Followers: 18

Kudos [?]: 233 [0], given: 260

Re: DS questions posted on Forums [#permalink]

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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)
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Re: DS questions posted on Forums [#permalink]

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29 Mar 2010, 05:07
Thanks a lot- appreciate it.
Senior Manager
Status: Not afraid of failures, disappointments, and falls.
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WE: Operations (Telecommunications)
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Kudos [?]: 233 [1] , given: 260

Re: DS questions posted on Forums [#permalink]

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29 Mar 2010, 16:40
1
KUDOS
yayy! got 1 kudos
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Re: DS questions posted on Forums [#permalink]

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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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