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Is x^2 > x ? (1) x is a prime number (2) x ≥1

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Nikhil
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Is x^2 > x ? (1) x is a prime number (2) x ≥1 [#permalink] New post   Updated on: 15 Mar 2019, 00:12
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59% (00:52) correct 41% (00:49) wrong based on 78 sessions
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Is x^2 > x ?

(1) x is a prime number
(2) x ≥1


GMATbuster's Weekly Quant Quiz#11 Ques #9


For Questions from earlier quizzes: Click Here
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Official Answer
A

Originally posted by Nikhil on 01 Dec 2018, 10:25.
Last edited by Bunuel on 15 Mar 2019, 00:12, edited 1 time in total.
Renamed the topic and edited the question.
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Re: Is x^2 > x ? (1) x is a prime number (2) x ≥1 [#permalink] New post   01 Dec 2018, 10:50
[quote="workout"]

GMATbuster's Weekly Quant Quiz#11 Ques #9


For Questions from earlier quizzes: Click Here


Is \(x^2 > x\) ?

(1) x is a prime number
(2) x ≥1
i) x is prime ,so x can be 2,3 ,5,7...
Let x=2
So x^2 =4
4>2
So sufficient
ii) x>=1
So let x=1
So x^2=1
1 is not greater than 1
So not sufficient
Answer is A


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Re: Is x^2 > x ? (1) x is a prime number (2) x ≥1 [#permalink] New post   01 Dec 2018, 11:22
to find
x^2 > X
statement 1
x is a prime number
X^2> X is possible in every case

statement 1 is sufficient

statement 2
X > 1 or x=1
when x =1
then x^2 = x

when X > 1
x^2 > x

there are two cases

hence statement two not sufficient


answer is A option
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Re: Is x^2 > x ? (1) x is a prime number (2) x ≥1 [#permalink] New post   01 Dec 2018, 11:41
st 1. x is prime number sufficient because prime number cannot be negative and fraction x^2 is always greater than x
st2 x is equal or greater than 1 - sufficient
Answer is D

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Re: Is x^2 > x ? (1) x is a prime number (2) x ≥1 [#permalink]
01 Dec 2018, 11:41
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Bunuel
Math Expert
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