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Source: — Data Sufficiency |
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by iwant700plus » Sun Mar 29, 2009 6:11 pm
Picture a number line:

-2----1---0---1---2

Is -2<y<1?

1) y>-1 pick numbers: y=0 YES -2<y<1; y=5 NO -2<y<1 - Insufficient.

2) y<2 again pick numbers: y=0 YES -2<y<1; y=-3NO -2<y<1 - Insufficient.

Together -1<y<2, again we realise the inequality -2<y<1 is not always true or always false. Insufficient.

Ans is E.
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