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If a and b are integers and a is even, what is the value of [#permalink]
19 Sep 2004, 22:09
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If a and b are integers and a is even, what is the value of a – b?
(1) a < 3
(2) a/b = 2/7
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Senior Manager
Joined: 19 May 2004
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E.
You have to know both a and b to calculate a-b.
1) Insufficient.
2) 7a=2b. Insufficient. Many possible values for a and b.
Both - Insufficient.
a=2 b=7 (a-b) = -5.
a=-2 b=7 (a-b)=5
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