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

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

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23 May 2016, 19:39
00:00

Difficulty:

5% (low)

Question Stats:

97% (00:34) correct 3% (00:19) wrong based on 48 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

SVP
Joined: 06 Nov 2014
Posts: 1861
Re: if a@b = a * b^(1/2) then 2@9 = ?  [#permalink]

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24 May 2016, 02:22
HungNguyen wrote:
if a@b = a * b^(1/2) then 2@9 = ?

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

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

Correct Option: B
Current Student
Joined: 18 Oct 2014
Posts: 774
Location: United States
GMAT 1: 660 Q49 V31
GPA: 3.98
Re: if a@b = a * b^(1/2) then 2@9 = ?  [#permalink]

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24 May 2016, 04:24
HungNguyen wrote:
if a@b = a * b^(1/2) then 2@9 = ?

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

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

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Re: if a@b = a * b^(1/2) then 2@9 = ?   [#permalink] 24 May 2016, 04:24