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500 ds

This topic has 1 member reply
dunkin77 Master | Next Rank: 500 Posts Default Avatar
Joined
01 Apr 2007
Posted:
269 messages

500 ds

Post Wed Apr 04, 2007 1:46 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    hI,

    I thought the answer is C) cause 64 could be X and meet the requirements - but the answer was E)... can anyone explain please??


    . Is x an even integer?
    (1) x is the square of an integer.
    (2) x is the cube of an integer.

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    jayhawk2001 Community Manager
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    Post Wed Apr 04, 2007 8:35 pm
    1 - insufficient. 2^2 = 4 and 3^2 = 9.

    2 - insufficient. 2^3 = 8 and 3^3 = 27

    1 and 2 together is insufficient as well. A simple test would be to
    try 2^6 and 3^6

    2^6 = (2^3)^2 or (2^2)^3 = even
    3^6 = (3^3)^2 or (3^2)^3 = odd

    Hence E

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