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# If yz = 6, what is the value of yz(y + z) ?

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Math Expert
Joined: 02 Sep 2009
Posts: 44655
If yz = 6, what is the value of yz(y + z) ? [#permalink]

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10 Dec 2017, 01:14
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Difficulty:

25% (medium)

Question Stats:

77% (00:40) correct 23% (00:54) wrong based on 31 sessions

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If yz = 6, what is the value of yz(y + z) ?

(1) y^2 = 9
(2) z^2 = 4
[Reveal] Spoiler: OA

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If yz = 6, what is the value of yz(y + z) ? [#permalink]

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10 Dec 2017, 03:40
Bunuel wrote:
If yz = 6, what is the value of yz(y + z) ?

(1) y^2 = 9
(2) z^2 = 4

Statement 1: $$y=3$$ or $$-3$$ so $$z=2$$ or $$-2$$. Hence multiple values of $$(y+z)$$ possible. Insufficient

Statement 2: $$z=2$$ or $$-2$$ so $$y=3$$ or $$-3$$. Hence multiple values of $$(y+z)$$ possible. Insufficient

Combining 1 & 2 we can have multiple values of $$(y+z)$$. Insufficient

Option E
If yz = 6, what is the value of yz(y + z) ?   [#permalink] 10 Dec 2017, 03:40
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