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Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2)
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Bunuel
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Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  26 Apr 2019, 01:16
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Is x an integer?

(1) \(x^3 = 8\)
(2) \(x = \sqrt{4}\)

DS22602.01
OG2020 NEW QUESTION
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LevanKhukhunashvili
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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  26 Apr 2019, 01:21
1 stm: get rid of power, x=2. suff
2 stm: x=\(\sqrt{4}\)=2. suff

IMO
Ans: D
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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  27 Apr 2019, 05:48
Bunuel wrote:
Is x an integer?

(1) \(x^3 = 8\)
(2) \(x = \sqrt{4}\)

DS22602.01
OG2020 NEW QUESTION


from 1 ; x= 2
and #2
x= +/-2
question has asked x is an integer answer yes
IMO D
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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  06 May 2019, 19:05
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Archit3110 wrote:
Bunuel wrote:
Is x an integer?

(1) \(x^3 = 8\)
(2) \(x = \sqrt{4}\)

DS22602.01
OG2020 NEW QUESTION




Statement One Alone:

x^3 = 8

Since x^3 = 8, x = 2, then x is an integer.

Statement one alone is sufficient to answer the question.

Statement Two Alone:

x = √4

Since x = √4, x = 2, then x is an integer. (Recall that the square root symbol means to take the principal square root of a number, which is only the positive square root.)

Statement two alone is sufficient to answer the question.

Answer: D
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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  11 May 2019, 13:13
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Hi All,

We're asked if X is an INTEGER. This is a YES/NO question. This question is built around some standard math rules and Number Properties.

(1) X^3 = 8

With Fact 1, we're cubing the value of X and ending with a POSITIVE value - thus, X MUST be positive. Here, the value of X = +2 and the answer to the question is YES.
Fact 1 is SUFFICIENT

(2) X =√4

With Fact 1, we have a number that's square-rooted for the value of X. The square root of a number has just ONE solution: a POSITIVE one. Here, we're dealing with the positive square-root of 4, so the value of X = +2 and the answer to the question is YES.
Fact 2 is SUFFICIENT

Final Answer:
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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  13 May 2019, 17:34
X is an Integer?

Statement 1:\(X^3 = 8\)
This gives , X=2. Option A alone is sufficient

Statement 2: X = √4
This gives x=2 , Option B alone is sufficient

Ans: D
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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  14 Mar 2020, 19:53
Bunuel. option B. according to Gmat, can we say that x!=2?
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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  15 Mar 2020, 02:47
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ShivamoggaGaganhs wrote:
Bunuel. option B. according to Gmat, can we say that x!=2?


Not sure I understand what yo mean but \(x = \sqrt{4}\) means that x = 2 only, nothing else.
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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  01 Jul 2020, 03:12
Bunuel wrote:
Is x an integer?

(1) \(x^3 = 8\)
(2) \(x = \sqrt{4}\)

DS22602.01
OG2020 NEW QUESTION




Statement 1: x^3=8 > x has to be 2 which is an integer, note: x cannot be -2 as x^3 is equal to 8. SUFFICIENT
Statement 2: x=squareroot 4. Square root of 4 is (+)(-) 2, i.e it can be both positive and negative therefore integer. SUFFICIENT


Hope that helps!
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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  01 Jul 2020, 15:37
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hemantbafna wrote:
Bunuel wrote:
Is x an integer?

(1) \(x^3 = 8\)
(2) \(x = \sqrt{4}\)

DS22602.01
OG2020 NEW QUESTION




Statement 1: x^3=8 > x has to be 2 which is an integer, note: x cannot be -2 as x^3 is equal to 8. SUFFICIENT
Statement 2: x=squareroot 4. Square root of 4 is (+)(-) 2, i.e it can be both positive and negative therefore integer. SUFFICIENT


Hope that helps!


Hi hemantbafna,

You selected the correct answer, but there's a subtle rule here that you appear to have missed. On the GMAT, the result of a square root of a positive number can ONLY be positive. For example....

√4 = +2

However, a squared-term that equals a positive number can lead to a positive or negative result. For example...

X^2 = 4..... X = +2 or -2.

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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink] New post  09 May 2021, 05:26
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Bunuel wrote:
Is x an integer?

(1) \(x^3 = 8\)
(2) \(x = \sqrt{4}\)

DS22602.01
OG2020 NEW QUESTION


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Re: Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2) [#permalink]
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