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Easy prob

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novi
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Easy prob [#permalink] New post   21 May 2011, 01:31
Question about the Greatest Common Factor.

Reducing: 9/12 to 3/4 by 3 ofc. The book then says, I have three fractions: 1/2, 1/3 and 1/5. I get the first and the second. Is the third (1/5) cause of 3/4 equals 0,75 which is divisable by 5?

Thanks guys!



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Re: Easy prob [#permalink] New post   24 May 2011, 00:02
please post the complete question to have a better understanding.
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Re: Easy prob [#permalink] New post   27 May 2011, 06:56
amit2k9 wrote:
please post the complete question to have a better understanding.


Hello,

I simply tried to keep it short, but looks like i failed :)

It is the introductoin to the "Greatest Common Factor" out of the ManhattenGMAT Prep book. I hope I can write it down without violating any copyright. ;)

"It is likely that you already know how to find both the GCF and the LCM. For example, when you reduce the fraction 9/12 to 3/4, you are dividing both the numerator (9) and the denominator (12) by 3, which is the GCF of 9 and 12. When you add together the fractions 1/2 + 1/3 + 1/5, you convert the fractions to thiertieths: And so on and so on."

I know what the GCF is and I calculate with it alot. I still dont know the the factor of 1/5 here. Sometimes I cant see it.

Thank you.
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Re: Easy prob [#permalink] New post   27 May 2011, 10:53
novi wrote:
amit2k9 wrote:
please post the complete question to have a better understanding.


Hello,

I simply tried to keep it short, but looks like i failed :)

It is the introductoin to the "Greatest Common Factor" out of the ManhattenGMAT Prep book. I hope I can write it down without violating any copyright. ;)

"It is likely that you already know how to find both the GCF and the LCM. For example, when you reduce the fraction 9/12 to 3/4, you are dividing both the numerator (9) and the denominator (12) by 3, which is the GCF of 9 and 12. When you add together the fractions 1/2 + 1/3 + 1/5, you convert the fractions to thiertieths: And so on and so on."

I know what the GCF is and I calculate with it alot. I still dont know the the factor of 1/5 here. Sometimes I cant see it.

Thank you.


I believe you won't violate any copyright if you post few questions from a book. So far you don't paste their entire content, it's just fine. In fact, the prep companies may see this as a free marketing of their book. A quality question may influence a reader to buy their entire book/study material. Moreover, most of the questions posted in this forum are from various prep sources and we don't hear any voice of objection from them.
**************

I still don't understand your question.

What do you mean by "factor of 1/5"?
You presented an example wherein you simplified a fraction by diving it with the GCD of numerator and denominator.

For, 1/2+1/3+1/5
Take LCM of (2,3,5), which is 30.
And proceed.
********************************
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Re: Easy prob [#permalink] New post   27 May 2011, 13:42
ahhh, now I got it. Thanks man. Sometimes I just can't see the simple things in life, you opened my eyes. No joke!

Greats!



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Re: Easy prob [#permalink]
27 May 2011, 13:42
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