divisible by 6

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heffsz: Newbie | Next Rank: 10 Posts; Posts: 8; Joined: Sun Oct 19, 2008 8:45 pm

by heffsz » Thu Dec 11, 2008 6:46 pm

Could someone please explain why the answer below is B? Thanks in advance.

If k and x are positive integers and x is divisible by 6, which of the following CANNOT be the value of sqrt (288kx) ?

A) 24k sqrt(3)
B) 24 sqrt(k)
C) 24 sqrt(3k)
D) 24 sqrt(6k)
E) 72 sqrt(k)

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Source: Beat The GMAT — Problem Solving | Thu Dec 11, 2008 6:46 pm

weena82: Newbie | Next Rank: 10 Posts; Posts: 9; Joined: Mon Dec 08, 2008 7:01 am; Location: Thailand; Thanked: 1 times

by weena82 » Thu Dec 11, 2008 7:47 pm

Hi,

The explaination is attached. Hope this help.

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Explain.doc: (28.5 KiB) Downloaded 108 times

weena

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heffsz: Newbie | Next Rank: 10 Posts; Posts: 8; Joined: Sun Oct 19, 2008 8:45 pm

by heffsz » Fri Dec 12, 2008 8:09 am

perfect explanation - thanks weena!

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