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10 and 11+x

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10 and 11+x [#permalink] New post 27 Dec 2016, 02:37
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Question Stats:

95% (00:17) correct 4% (00:08) wrong based on 45 sessions
Quantity A
Quantity B
10
11+x


A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

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Re: 10 and 11+x [#permalink] New post 27 Dec 2016, 10:32
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Expert's post
Carcass wrote:
Quantity A
Quantity B
10
11 + x



Although the correct answer might be immediately obvious, let's apply the technique of matching operations.

Given:
Quantity A: 10
Quantity B: 11 + x

Subtract 11 from both quantities to get:
Given:
Quantity A: -1
Quantity B: x

Since we aren't given ANY information about the value of x, it COULD be that x = 1, in which case quantity B is greater.
Or it COULD be that x = -2, in which case quantity A is greater.
Or it COULD be that x = -1, in which case quantity A and quantity B are EQUAL.

Answer: D
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Re: 10 and 11+x   [#permalink] 27 Dec 2016, 10:32
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