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Is xy divisible by 6 ?

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by sumanr84 » Wed Jan 27, 2010 9:32 am
If w, x and y are different positive integers, and wxy = 24, is xy divisible by 6?

(1) wy is not divisible by 6.

(2) x is even.

set your timer and try solving within 1 min first..

source : www.magoosh.com
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Source: — Data Sufficiency |
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by dmitriyaleyev » Wed Jan 27, 2010 9:46 am
e ???

1. clearly ins as it doesn't address x
2. is a multiple of 2, but we don't know if necessary 3
1+2. we know xy has 2 but again know nothing about 3
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by ajith » Wed Jan 27, 2010 9:52 am
sumanr84 wrote:If w, x and y are different positive integers, and wxy = 24, is xy divisible by 6?

(1) wy is not divisible by 6.

(2) x is even.

set your timer and try solving within 1 min first..

source : www.magoosh.com
1 is not sufficient
2 is not sufficient

1&2 together also is not sufficient

{wy = 3 x=8, example}
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by tanviet » Thu Jan 28, 2010 3:05 am
I do not study this hard

we factor the 24=2.2.2.3

for deviding problem, alway factor into primes

E is correct
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