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Any number property tricks?


 
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maxim730
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PostPosted: Sat Dec 30, 2006 12:31 pm    Post subject: Any number property tricks? Reply with quote
Hi All,

I am trying to find/figure out if there is a way to solve problems like "how many integers between a and b are divisible by 3" or "The product of the 1st
positive integers is NOT divisible by the following..", etc.

Can anyone list me some formulas/tricks that will be helpful?

Thanks Smile
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beatthegmat
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PostPosted: Sat Dec 30, 2006 1:39 pm    Post subject: Re: Any number property tricks? Reply with quote
maxim730 wrote:
Hi All,

I am trying to find/figure out if there is a way to solve problems like "how many integers between a and b are divisible by 3" or "The product of the 1st
positive integers is NOT divisible by the following..", etc.

Can anyone list me some formulas/tricks that will be helpful?

Thanks Smile


Have you downloaded my GMAT Flashcards? I discuss some tricks related to these kinds of problems: http://www.beatthegmat.com/viewtopic.php?t=32
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