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anonymousegmat
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easy PS 28 Jul 2007, 15:50
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this isn't a tough question, i am just interested in seeing how others solve it. the official explanation was different from what most would expect, but WAY more efficient.

What number divided by 13/17 equals 119/65

4/7
5/8
5/7
7/5
8/5



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ioiio
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easy PS 28 Jul 2007, 16:51
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anonymousegmat
this isn't a tough question, i am just interested in seeing how others solve it. the official explanation was different from what most would expect, but WAY more efficient.

What number divided by 13/17 equals 119/65

4/7
5/8
5/7
7/5
8/5
Show more


I would answer 5/7

13 * 65
---------
17 * 119

=

xx5
----
yy3

It has to be 5/7 from the choices given. I dint bother to calculate, but let me know if my logic is wrong.
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ioiio
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easy PS 28 Jul 2007, 16:56
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Actually I messed up the Nr and Dr.

119*13 / 65*17 = **7/**5

should give 7/5 for the same reason
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briks123
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easy PS 28 Jul 2007, 17:01
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D.

(17/13)x=(119/65)

x=(13*119)/(17*65)=(13*17*7)/(17*15*5)=7/5
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Juaz
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easy PS 28 Jul 2007, 18:43
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anonymousegmat
this isn't a tough question, i am just interested in seeing how others solve it. the official explanation was different from what most would expect, but WAY more efficient.

What number divided by 13/17 equals 119/65

4/7
5/8
5/7
7/5
8/5
Show more


X/(13/17) = 119/65
=> X = (119/65)*(13/17) = 7/5
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anonymousegmat
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easy PS 28 Jul 2007, 19:40
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briks123
D.

(17/13)x=(119/65)

x=(13*119)/(17*65)=(13*17*7)/(17*15*5)=7/5
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you are correct, but they set it up and solved it using a system of equations which i thought was very interesting.
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briks123
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easy PS 28 Jul 2007, 21:21
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anonymousegmat
briks123
D.

(17/13)x=(119/65)

x=(13*119)/(17*65)=(13*17*7)/(17*15*5)=7/5

you are correct, but they set it up and solved it using a system of equations which i thought was very interesting.
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hmmm. weird. i wouldn't even think to do that!
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GMATBLACKBELT
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easy PS 28 Jul 2007, 21:52
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At first I read it as 13/17/x/y So when I plugged in answer choices the only one that came close was D. So I reread it and I realized that I had the question wrong. (Answer is still D though)

Also u can do it this way 17/13x=119/65



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This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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