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

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Manager
Joined: 26 Jul 2010
Posts: 102

Kudos [?]: 32 [0], given: 6

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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21 Apr 2011, 20:12
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Difficulty:

85% (hard)

Question Stats:

19% (01:42) correct 81% (01:33) wrong based on 21 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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Kudos [?]: 32 [0], given: 6

Director
Status: Impossible is not a fact. It's an opinion. It's a dare. Impossible is nothing.
Affiliations: University of Chicago Booth School of Business
Joined: 03 Feb 2011
Posts: 871

Kudos [?]: 401 [0], given: 123

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

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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.

Posted from my mobile device

Kudos [?]: 401 [0], given: 123

Manager
Joined: 18 Jan 2011
Posts: 228

Kudos [?]: 37 [0], given: 4

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

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21 Apr 2011, 22:26
Explained here

in-the-decimal-above-and-x-represent-single-digits-94965.html
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***Help and be helped!!!****

Kudos [?]: 37 [0], given: 4

Re: In the decimal above, ♣ and @ represent single digits....   [#permalink] 21 Apr 2011, 22:26
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