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28 May 2017, 02:02
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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Is x an odd integer?
(1) x is the square root of an integer.
(2) x is the square of an integer.
(1) x is the square root of an integer.
(2) x is the square of an integer.
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28 May 2017, 02:37
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(a) is not sufficient. if x is odd say 5 it is a square root of 25
(b) squares are either even or odd (25 , 16) hence not sufficient
combining both if x is 9 then it follows both the scenarios and if x is 16 then also it follows both the scenarios...hence the answer would be E
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(b) squares are either even or odd (25 , 16) hence not sufficient
combining both if x is 9 then it follows both the scenarios and if x is 16 then also it follows both the scenarios...hence the answer would be E
Sent from my iPhone using GMAT Club Forum
29 May 2017, 02:37
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Statement 1 is not sufficient as it tells only about square root of an integer. The integer can be odd or even so as per this statement we have following examples, 0,1,2,3,4,5 etc.
Statement 2 is not sufficient as it tells only about square of an integer. The integer can be odd or even like 0,1,4,9,16,25, etc.
Even if we combine, we have to find an integer which is both square and square root of an integer so we have integers like 0,1, 4, 9, etc. This also does not tell us about integer being even or odd. So Insufficient.
The correct answer should be option E.
Statement 2 is not sufficient as it tells only about square of an integer. The integer can be odd or even like 0,1,4,9,16,25, etc.
Even if we combine, we have to find an integer which is both square and square root of an integer so we have integers like 0,1, 4, 9, etc. This also does not tell us about integer being even or odd. So Insufficient.
The correct answer should be option E.
