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# What is the value of x^3 − y^3?

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Math Expert
Joined: 02 Sep 2009
Posts: 50002
What is the value of x^3 − y^3?  [#permalink]

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19 Apr 2017, 07:56
1
00:00

Difficulty:

15% (low)

Question Stats:

96% (00:58) correct 4% (00:19) wrong based on 43 sessions

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What is the value of x^3 − y^3?

(1) x − y = x + 3
(2) x − y = 4 − y

_________________
Director
Joined: 21 Mar 2016
Posts: 526
Re: What is the value of x^3 − y^3?  [#permalink]

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19 Apr 2017, 08:24
stat1 : gives only value of y not suff

stat 2: gives only value of x,, not suff

both combine gives value of x and y,,,suff

ans C
Director
Joined: 05 Mar 2015
Posts: 995
Re: What is the value of x^3 − y^3?  [#permalink]

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19 Apr 2017, 08:28
Bunuel wrote:
What is the value of x^3 − y^3?

(1) x − y = x + 3
(2) x − y = 4 − y

(1) y=-3 (canceling x both sides)
no value for y ....insuff

(2) x=4 (canceling y both sides)
no value for x ....insuff

combining we get both x &y
suff

Ans C
Re: What is the value of x^3 − y^3? &nbs [#permalink] 19 Apr 2017, 08:28
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# What is the value of x^3 − y^3?

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