Is a positive?
(1) |1 - a | = 5.
(2) a^2 - 2a - 24 = 0.
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Is a positive?
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sanju09
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Sanjeev K Saxena
Quantitative Instructor
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theCodeToGMAT
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To find: a is positive?
Statement 1:
|1 - a | = 5
If 1 - a = 5 ==> a = -4
If a - 1 = 5 ==> a = 6
INSUFFICIENT
Statement 2:
a^2 - 2a - 24 = 0
a^2 - 6a + 4a - 24 = 0
a(a - 6) + 4(a - 6) = 0
(a + 4) (a - 6) = 0
a = -4 or 6
INSUFFICIENT
Combining...
a = -4 or 6
INSUFFICIENT
Answer [spoiler]{E}[/spoiler]
Statement 1:
|1 - a | = 5
If 1 - a = 5 ==> a = -4
If a - 1 = 5 ==> a = 6
INSUFFICIENT
Statement 2:
a^2 - 2a - 24 = 0
a^2 - 6a + 4a - 24 = 0
a(a - 6) + 4(a - 6) = 0
(a + 4) (a - 6) = 0
a = -4 or 6
INSUFFICIENT
Combining...
a = -4 or 6
INSUFFICIENT
Answer [spoiler]{E}[/spoiler]
R A H U L
