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# Challenge 25 (q37)

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Current Student
Joined: 04 Nov 2006
Posts: 132
Followers: 1

Kudos [?]: 26 [0], given: 8

Challenge 25 (q37) [#permalink]  07 Nov 2006, 05:24
Can't understand the expln?
q. 1/(2-sqrt(3))=?

sqrt(3) - 2
2 + sqrt(3)
sqrt(2) + sqrt(3)
2 - sqrt(3)
sqrt(3) + 4
VP
Joined: 28 Mar 2006
Posts: 1384
Followers: 2

Kudos [?]: 20 [0], given: 0

Multiple and divide numerator and denoiminator by 2+sqrt(3)

u get 2+sqrt(3)
Senior Manager
Joined: 05 Oct 2006
Posts: 268
Followers: 1

Kudos [?]: 4 [0], given: 0

Re: Challenge 25 (q37) [#permalink]  07 Nov 2006, 08:59
choice b

multiply num and den with 2+Sqrt 3
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5077
Location: Singapore
Followers: 22

Kudos [?]: 186 [0], given: 0

1/(2-sqrt3)
= 1/(2-sqrt3) * (2+sqrt3)/(2+sqrt3)
= 2+sqrt3/4 - 3
= 2+sqrt3
SVP
Joined: 01 May 2006
Posts: 1804
Followers: 8

Kudos [?]: 100 [0], given: 0

Re: Challenge 25 (q37) [#permalink]  08 Nov 2006, 06:58
pawan82 wrote:
Can't understand the expln?
q. 1/(2-sqrt(3))=?

sqrt(3) - 2
2 + sqrt(3)
sqrt(2) + sqrt(3)
2 - sqrt(3)
sqrt(3) + 4

We are asked to find an easiest way to write the equation... to simplify it
Re: Challenge 25 (q37)   [#permalink] 08 Nov 2006, 06:58
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