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divisibility

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Junior | Next Rank: 30 Posts
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by japan1453 » Sun Jul 19, 2009 5:31 pm
Is the integer r divisible by 3 ?

1) r is the product of 4 consecutive numbers

2) r<25



Thanks

OA [spoiler] A

[/spoiler]
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by raghavsarathy » Sun Jul 19, 2009 5:57 pm
Statement 1

The product of any 4 consecutive numbers is definetly divisible by 3.

Take exampes 1.2.3.4 , 2.3.4.5 , 11.12.13.14 etc etc.. Each of these products is definetly divisible by 3.

Hence statement 1 is sufficient

Statement 2

r= 7(not divisible by 3)
r=6 (divisible by 3)

Hence statement 2 is not sufficient.

Ans - A
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by jjk » Tue Jul 21, 2009 11:43 am
Statement 1 would be better phrased as "four consecutive integers."
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by real2008 » Wed Jul 22, 2009 1:11 am
jjk wrote:Statement 1 would be better phrased as "four consecutive integers."
how can one number be confirmed to be integer? are u looking the answer choice A and then framing the question to suit accordingly?
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