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# Is x = y ? (1) x^2 - y = 0 (2) x - 1 > 0

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Math Expert
Joined: 02 Sep 2009
Posts: 50042
Is x = y ? (1) x^2 - y = 0 (2) x - 1 > 0  [#permalink]

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03 Dec 2017, 06:22
00:00

Difficulty:

25% (medium)

Question Stats:

73% (01:01) correct 27% (01:10) wrong based on 51 sessions

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Is x = y ?

(1) x^2 - y = 0
(2) x - 1 > 0

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Manager
Joined: 24 Nov 2016
Posts: 152
Re: Is x = y ? (1) x^2 - y = 0 (2) x - 1 > 0  [#permalink]

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03 Dec 2017, 07:04
Bunuel wrote:
Is x = y ?

(1) x^2 - y = 0
(2) x - 1 > 0

Is x=y?
(1) x^2 - y = 0; x=1 y=1, then condition is true. x=2 y=4, also true; x=-1 y=1, also true; not suf.
(2) x - 1 > 0; x must be > 1, what about y? not suf.
(Both) if (2) x > 1 then from (1) x is different than y, this is sufficient; answer is (C).
Re: Is x = y ? (1) x^2 - y = 0 (2) x - 1 > 0 &nbs [#permalink] 03 Dec 2017, 07:04
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