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9 @7 In the decimal above, and @ represent single digits.

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Manager
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Joined: 26 Jul 2010
Posts: 103
Location: India
Concentration: Operations, General Management
Schools: IIMA (M)
GMAT 1: 640 Q48 V29
GMAT 2: 670 Q49 V31
WE: Supply Chain Management (Military & Defense)
9 @7 In the decimal above, and @ represent single digits. [#permalink]

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New post 21 Apr 2011, 20:12
00:00
A
B
C
D
E

Difficulty:

  85% (hard)

Question Stats:

20% (02:42) correct 80% (01:34) wrong based on 20 sessions

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$ 7.9♣@7

In the decimal above, ♣ and @ represent single digits. What is the value of @ ?


(1) When the sum is rounded to the nearest cent, its cash value is $7.94.

(2) When the sum is rounded to the nearest tenth of a cent, its cash value is $7.95.
[Reveal] Spoiler: OA

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Re: In the decimal above, ♣ and @ represent single digits.... [#permalink]

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New post 21 Apr 2011, 21:42
Hey when I doing Kaplan test I just marked C bcos I was short of time

7.9ab7
My thoughts-
From 1) we have
a can be 3 or 4
If a is 3 then b>=5
if a is 4 then b<=4

From 2) we have a is atleast 4. No information about b

1) + 2)
a is 4 and b<=4. But then b must be highest since The dollar value when rounded to nearest tenth of a cent is 9.500. So I got the value as 9.9447

It doesn't work either ! You can see the discrepancy. I am thinking if I missed a puzzle piece.

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Manager
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Joined: 18 Jan 2011
Posts: 230
Re: In the decimal above, ♣ and @ represent single digits.... [#permalink]

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New post 21 Apr 2011, 22:26
Explained here

in-the-decimal-above-and-x-represent-single-digits-94965.html
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Re: In the decimal above, ♣ and @ represent single digits....   [#permalink] 21 Apr 2011, 22:26
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9 @7 In the decimal above, and @ represent single digits.

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