if a@b = a * b^(1/2) then 2@9 = ? : Problem Solving (PS)

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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

self made

Spoiler: OA

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

self made

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

Correct Option: B

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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

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, 04:24

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

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