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Inequality.................

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Manager
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Inequality................. [#permalink]

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New post 27 Apr 2009, 21:07
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10. If x and y are two-digit integers such that x > 40 and y<70, which of the following is closest to the maximum possible value of xy ?
(A) 700
(B) 2,800
(C) 4,000
(D) 7,000
(E) 28,000

Kudos [?]: 104 [0], given: 1

Manager
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Joined: 27 Jun 2008
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Kudos [?]: 34 [0], given: 11

Re: Inequality................. [#permalink]

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New post 22 Jul 2009, 01:23
Can you please elaborate here, I can't see a correlation between X and Y, X begins at 40 and without restriction it can grow to any value.

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Manager
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Re: Inequality................. [#permalink]

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New post 22 Jul 2009, 01:24
My Bad, Missed that they are 2 digit integers.

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Manager
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Schools: Stanford...Wait, I will come!!!
Re: Inequality................. [#permalink]

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New post 22 Jul 2009, 05:30
milind1979 wrote:
10. If x and y are two-digit integers such that x > 40 and y<70, which of the following is closest to the maximum possible value of xy ?
(A) 700
(B) 2,800
(C) 4,000
(D) 7,000
(E) 28,000

.. The, the number should be either both positive or both negative.
As both negative is not possible, it should be both positive.
Within the constraints, x can be at max 99, and Y can be at max 69.
Multiplying both, D is the answer

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Manager
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Joined: 27 Jun 2008
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Re: Inequality................. [#permalink]

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New post 22 Jul 2009, 09:08
Yeah, thanks could figure that out.

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Director
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Re: Inequality................. [#permalink]

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New post 22 Jul 2009, 10:54
99*69 ~ 100*70= 7000

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Re: Inequality.................   [#permalink] 22 Jul 2009, 10:54
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Inequality.................

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