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72% (00:51) correct
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08 Dec 2016, 20:11
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Bunuel
What is the value of positive number a?
(1) 2a = a^2
(2) a + 2 = 2a
(1) 2a = a^2
(2) a + 2 = 2a
since a is positive number a>0
we can cancel a in both cases
(1) 2a=a^2
a=2...suff
(2) a + 2 = 2a
a=2----suff
Ans D
21 Sep 2017, 19:35
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Since a is positive, from statement 1 value is 2.
We discard the value 0 for a.
We discard the value 0 for a.
