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What is the value of

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Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 7728
GMAT 1: 760 Q51 V42
GPA: 3.82
What is the value of  [#permalink]

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23 Apr 2019, 00:53
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Difficulty:

55% (hard)

Question Stats:

48% (01:35) correct 52% (01:26) wrong based on 33 sessions

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[GMAT math practice question]

What is the value of
Attachment:

4.23.png [ 1.02 KiB | Viewed 355 times ]
?

A. 1
B. 2
C. 3
D. 4
E. 5

_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $79 for 1 month Online Course" "Free Resources-30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons - try it yourself" Senior Manager Joined: 13 Feb 2018 Posts: 448 GMAT 1: 640 Q48 V28 Re: What is the value of [#permalink] Show Tags 23 Apr 2019, 03:55 1 Here is the approach Let the whole expression be x We can observe that 6 is divided by x too, as the division process is endless, so we have got x=1+$$\frac{6}{x}$$ $$x^2$$-x-6=0 (x-3)(x+2)=0 x=3; x=-2 IMO Ans: C Intern Joined: 16 Nov 2015 Posts: 27 Location: United Kingdom Re: What is the value of [#permalink] Show Tags 24 Apr 2019, 02:46 LevanKhukhunashvili I understand your working out but how can we observe that 6 is divided by x. I made mine y=1+ (6/x) . Obviously that is wrong however I don't understand why you made yours x equals Senior Manager Joined: 13 Feb 2018 Posts: 448 GMAT 1: 640 Q48 V28 Re: What is the value of [#permalink] Show Tags 24 Apr 2019, 03:10 Albs wrote: LevanKhukhunashvili I understand your working out but how can we observe that 6 is divided by x. I made mine y=1+ (6/x) . Obviously that is wrong however I don't understand why you made yours x equals Please find the similarity between first and the circled part of the second expressions If the first expression is x Then the circled part on the second expression must be x as well Hope it's clear Attachments 4.23.png [ 3.92 KiB | Viewed 237 times ] Math Revolution GMAT Instructor Joined: 16 Aug 2015 Posts: 7728 GMAT 1: 760 Q51 V42 GPA: 3.82 Re: What is the value of [#permalink] Show Tags 25 Apr 2019, 01:24 Attachment: 4.25.png [ 1.58 KiB | Viewed 204 times ] This is equivalent to $$x = 1 + \frac{6}{x}$$ or $$x^2 = x + 6.$$ Rearranging yields $$x^2 - x + 6 = 0$$ or $$(x+2)(x-3)=0.$$ So, $$x = -2$$ or $$x = 3$$. Since $$x$$ is a positive number, $$x = 3$$. Therefore, the answer is C Answer: C _________________ MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only$79 for 1 month Online Course"
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Re: What is the value of   [#permalink] 25 Apr 2019, 01:24
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