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please explain

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

please explain

Post Thu Jun 04, 2015 2:36 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    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

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    Post 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.

    The correct answer is D.

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