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This topic has 1 expert reply and 0 member replies
ejager Newbie | Next Rank: 10 Posts
Joined
27 May 2015
Posted:
9 messages

Thu Jun 04, 2015 2:36 am
What is the cube root of w?
1. the 5th root of w is 64
2. the 15th root of w is 4

The MGMAT solution is quite complicated and un-intuitive for me- is there another way to think about this problem?

thanks

### GMAT/MBA Expert

GMATGuruNY GMAT Instructor
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Thu Jun 04, 2015 2:43 am
ejager wrote:
What is the cube root of w?
1. the 5th root of w is 64
2. the 15th root of w is 4
What is the value of w^(1/3)?

Statement 1:
w^(1/5) = 64.
Since we can solve for w, we can determine the value of w^(1/3).
SUFFICIENT.

Statement 2:
w^(1/15) = 4.
Since we can solve for w, we can determine the value of w^(1/3).
SUFFICIENT.

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