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19 Mar 2012, 04:59
Kudos
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
46% (01:13) correct
54%
(00:59)
wrong
based on 138
sessions
History
Date
Time
Result
Not Attempted Yet
Is q^2 an odd integer?
(1) q is an odd integer.
(2) q^4 is an odd integer.
How come the answer will be A? For me it should be straight D or I am reading something wrong.
(1) q is an odd integer.
(2) q^4 is an odd integer.
How come the answer will be A? For me it should be straight D or I am reading something wrong.
19 Mar 2012, 05:09
Kudos
Bookmarks
Is q^2 an odd integer?
Notice that we are not told that q is an integer.
(1) q is an odd integer --> q^2 is odd. Sufficient.
(2) q^4 is an odd integer --> if \(q=odd\) then the answer would be YES, but if \(q=\sqrt[4]{3}\) then the answer would be NO, since \(q^2=\sqrt{3}\) is not an integer at all. Not sufficient.
Answer: A.
Hope it's clear.
Notice that we are not told that q is an integer.
(1) q is an odd integer --> q^2 is odd. Sufficient.
(2) q^4 is an odd integer --> if \(q=odd\) then the answer would be YES, but if \(q=\sqrt[4]{3}\) then the answer would be NO, since \(q^2=\sqrt{3}\) is not an integer at all. Not sufficient.
Answer: A.
Hope it's clear.
19 Mar 2012, 05:18
Kudos
Bookmarks
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