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if a@b = a * b^(1/2) then 2@9 = ?

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Intern
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Joined: 07 May 2016
Posts: 25
if a@b = a * b^(1/2) then 2@9 = ?  [#permalink]

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New post 23 May 2016, 20:39
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

97% (00:33) correct 3% (00:19) wrong based on 46 sessions

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if a@b = a * b^(1/2) then 2@9 = ?

A. 2
B. 6
C. 3
D. 8
E. 4

self made
Spoiler: OA
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B
Joined: 06 Nov 2014
Posts: 1868
Re: if a@b = a * b^(1/2) then 2@9 = ?  [#permalink]

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New post 24 May 2016, 03:22
HungNguyen wrote:
if a@b = a * b^(1/2) then 2@9 = ?

A. 2
B. 6
C. 3
D. 8
E. 4

self made


a@b = a * b^(1/2)
2@9 = 2*9^(1/2) = 2*3 = 6

Correct Option: B
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GMAT 1: 660 Q49 V31
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Re: if a@b = a * b^(1/2) then 2@9 = ?  [#permalink]

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New post 24 May 2016, 05:24
HungNguyen wrote:
if a@b = a * b^(1/2) then 2@9 = ?

A. 2
B. 6
C. 3
D. 8
E. 4

self made


2* (9)^1/2= 2*3= 6

B is the answer
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Re: if a@b = a * b^(1/2) then 2@9 = ?   [#permalink] 24 May 2016, 05:24
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