The value of M

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ronsom: Junior | Next Rank: 30 Posts; Posts: 23; Joined: Fri Apr 16, 2010 12:01 pm; Thanked: 2 times

by ronsom » Fri May 21, 2010 1:54 am

I'm sure the answer would not require me to calculate the 3rd and 4th root of 4... but how do I estimate? The value could be less or more than 3 by a small fraction!

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Source: Beat The GMAT — Problem Solving | Fri May 21, 2010 1:54 am

liferocks: Legendary Member; Posts: 576; Joined: Sat Mar 13, 2010 8:31 pmFollowed by: 1 member; Thanked: 97 times

by liferocks » Fri May 21, 2010 1:59 am

V4=2
and 4^1/4=V2=1.4
so 4^1/3>1
and should be greater than 4
ans option E

"If you don't know where you are going, any road will get you there."
Lewis Carroll

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Patrick_GMATFix: GMAT Instructor; Posts: 1052; Joined: Fri May 21, 2010 1:30 amFollowed by: 98 members; Thanked: 335 times

by Patrick_GMATFix » Fri May 21, 2010 2:01 am

You're right. you don't need to calculate the 4th root of 4. Only recognize that it's greater than 1.
This is QID 1022

-Patrick

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