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# What is the value of b?

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Math Expert
Joined: 02 Sep 2009
Posts: 41873

Kudos [?]: 128601 [0], given: 12180

What is the value of b? [#permalink]

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12 Sep 2017, 05:21
00:00

Difficulty:

35% (medium)

Question Stats:

69% (00:48) correct 31% (00:45) wrong based on 15 sessions

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What is the value of b?

(1) The average of $$\sqrt{b}$$ and 2b is two more than b.

(2) $$b^{(\frac{3}{2})} = 64$$
[Reveal] Spoiler: OA

_________________

Kudos [?]: 128601 [0], given: 12180

Manager
Joined: 02 Nov 2015
Posts: 176

Kudos [?]: 22 [0], given: 121

GMAT 1: 640 Q49 V29
Re: What is the value of b? [#permalink]

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12 Sep 2017, 07:00
B.
Statement 2 alone is sufficient.

Statement 1: simply tells that B is positive

Statement 2: on solving we get B =16.

Sent from my Lenovo TAB S8-50LC using GMAT Club Forum mobile app

Kudos [?]: 22 [0], given: 121

Intern
Joined: 25 May 2017
Posts: 4

Kudos [?]: 6 [0], given: 11

Re: What is the value of b? [#permalink]

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12 Sep 2017, 14:33
D.

St1: (2B+sqrtB)/2 = (B+2) ----> sqrtB = 4
Solving we get B = 16

St2: B = 16

Kudos [?]: 6 [0], given: 11

Re: What is the value of b?   [#permalink] 12 Sep 2017, 14:33
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