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Hi Bunuel/Karishma, In the GMAT Math Book (page #5), it says

• If \(a\) is a factor of \(b\) and \(b\) is a factor of \(a\), then \(a=b\) or \(a=-b\).

I can get it but it creates confusion when Veritas Arithmetic book (page # 20) says "Negative numbers are never factors.". So,where is the catch ?

P.S: I hope it's the right place to ask these questions. As I don't post much questions on Math forum so if this is not the right place please move it to the right forum.Thank you!

Yes, for the GMAT we consider only positive factors.

Thanks for the short clarification Bunuel.

P.S: I think, it'd be nice if we insert your comment in the same place in our Math book, if not already there!
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I am preparing for GMAT and i have a problem in maths...i am week in math and i have to face many problems in maths such as integration,percentage and many others....WHAT CAN I DO.?

One of the Math Prep eBook is available at the website 'aptiDude [dot] com' ... It contains all the important tips ,tricks and formulas for all quantitative aptitude topics. Must have a look... http://aptidude.com/trickbook _________________

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Trailing zeros are a sequence of 0's after which no other digits follow. So, yes 125,000 has 3 trailing 0's.

mh Im a bit confused actually I thought Trailing zeros are to the right of a decimal point, as in 25.7200 and so do not affect the value of a number
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Thanks for this, it saves so much of my time!!! I have been taking online course but have this fear of being left out by just following course!!! This will definitely help

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