Any number property tricks?

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Any number property tricks?

by maxim730 » Sat Dec 30, 2006 11:31 am
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 :)

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Re: Any number property tricks?

by beatthegmat » Sat Dec 30, 2006 12:39 pm
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 :)
Have you downloaded my GMAT Flashcards? I discuss some tricks related to these kinds of problems: https://www.beatthegmat.com/viewtopic.php?t=32
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