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alphonsa
Joined: 22 Jul 2014
Last visit: 25 Oct 2020
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Concentration: General Management, Finance
Schools: Cox '19 (D) Babson '19 (A$) Katz '19 (D) Eller"19 (A$) Northeastern '19 (A$) Krannert '19 (A$) ISB '18 (D) Rutgers '19 (A) Olin '19 (I)
GMAT 1: 670 Q48 V34
WE:Engineering (Energy)
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Schools: Cox '19 (D) Babson '19 (A$) Katz '19 (D) Eller"19 (A$) Northeastern '19 (A$) Krannert '19 (A$) ISB '18 (D) Rutgers '19 (A) Olin '19 (I)
GMAT 1: 670 Q48 V34
Posts: 106
B
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45%
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Is the positive number x an integer?
(1) 3x is a perfect square.
(2) 2x is divisible by 4.
Source: 4gmat
(1) 3x is a perfect square.
(2) 2x is divisible by 4.
Source: 4gmat
15 Aug 2014, 09:04
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Is the positive number x an integer?
(1) 3x is a perfect square. If \(x=\frac{1}{3}\), then 3x = 1 = 1^2 and in this case x is not an integer but if x = 3, then 3x = 9 = 3^2 and in this case x is an integer. Not sufficient.
(2) 2x is divisible by 4 --> 2x = 4k --> x = 2k = even = integer. Sufficient.
Answer: B.
(1) 3x is a perfect square. If \(x=\frac{1}{3}\), then 3x = 1 = 1^2 and in this case x is not an integer but if x = 3, then 3x = 9 = 3^2 and in this case x is an integer. Not sufficient.
(2) 2x is divisible by 4 --> 2x = 4k --> x = 2k = even = integer. Sufficient.
Answer: B.
kplusprinja1988
Joined: 13 Apr 2015
Last visit: 12 Dec 2018
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Schools: Rotman '17 UT Dallas FLEX & Online'18
12 Jun 2016, 14:36
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in the secnd statement we have 2x is divisible by 4.Cant we have x=1.6 then also 2x is divisible by 4.In that case x is not an integer,,
