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Source: — Data Sufficiency |

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by Ian Stewart » Sat Sep 18, 2010 5:39 pm
If xy = -18, one of x or y is negative, the other positive. Certainly the negative number is smaller than the positive number. So Statement 1, which tells us x is negative, is sufficient alone. Statement 2 is not sufficient, since x could be 9, and y could be -2, or vice versa.
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by Gurpinder » Sat Sep 18, 2010 9:55 pm
Thx.
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