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# At the Trenchard Oaks apartment complex, a two-bedroom apartment costs

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Math Expert
Joined: 02 Sep 2009
Posts: 56239
At the Trenchard Oaks apartment complex, a two-bedroom apartment costs  [#permalink]

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30 Aug 2018, 21:52
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Difficulty:

25% (medium)

Question Stats:

71% (01:21) correct 29% (01:35) wrong based on 118 sessions

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At the Trenchard Oaks apartment complex, a two-bedroom apartment costs 50% more to rent than a one-bedroom apartment. If Alex were to rent a two-bedroom apartment for x months it would cost him the same amount as it would to rent a one-bedroom for 12 months. What is x ?

A. 6
B. 8
C. 9
D. 10
E. 18

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Re: At the Trenchard Oaks apartment complex, a two-bedroom apartment costs  [#permalink]

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30 Aug 2018, 22:03
Bunuel wrote:
At the Trenchard Oaks apartment complex, a two-bedroom apartment costs 50% more to rent than a one-bedroom apartment. If Alex were to rent a two-bedroom apartment for x months it would cost him the same amount as it would to rent a one-bedroom for 12 months. What is x ?

A. 6
B. 8
C. 9
D. 10
E. 18

IMHO,

1.5a* x= a*12
x= 8 months

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Re: At the Trenchard Oaks apartment complex, a two-bedroom apartment costs  [#permalink]

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30 Aug 2018, 22:54
1
Let the rent for 1 bed room apartment = $100 So the rent for 2 bedroom apartment will be$100 x 50/100 = 150

1 bed room apartment for 12 months = 100x12 = $1200 2 bed room apartment for x months = 1200/150 = 8 months Hence the answer is B EMPOWERgmat Instructor Status: GMAT Assassin/Co-Founder Affiliations: EMPOWERgmat Joined: 19 Dec 2014 Posts: 14542 Location: United States (CA) GMAT 1: 800 Q51 V49 GRE 1: Q170 V170 Re: At the Trenchard Oaks apartment complex, a two-bedroom apartment costs [#permalink] ### Show Tags 15 Nov 2018, 23:28 Hi All, We're told that a two-bedroom apartment costs 50% more to rent than a one-bedroom apartment. If Alex were to rent a two-bedroom apartment for X months it would cost him the same amount as it would to rent a one-bedroom for 12 months. We're asked for the value of X. This question can be solved in a couple of different ways. TESTing VALUES works really well (as ArjunJag1328 has shown); it can also be solved by TESTing THE ANSWERS. Since a two-bedroom apartment costs 50% more than a one-bedroom apartment, we need to find a value for X that, when increased by 50%, equals 12. Since a 50% increase is NOT the same as DOUBLING a value, we can eliminate Answer A. Let's TEST Answer B first. Answer B: 8 months IF... X = 8, then 50% MORE than 8 would be (1.5)(8) = 12 This is an exact match for what we were told, so this must be the answer. Final Answer: GMAT assassins aren't born, they're made, Rich _________________ 760+: Learn What GMAT Assassins Do to Score at the Highest Levels Contact Rich at: Rich.C@empowergmat.com *****Select EMPOWERgmat Courses now include ALL 6 Official GMAC CATs!***** # Rich Cohen Co-Founder & GMAT Assassin Special Offer: Save$75 + GMAT Club Tests Free
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Re: At the Trenchard Oaks apartment complex, a two-bedroom apartment costs  [#permalink]

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20 Dec 2018, 07:22
Bunuel wrote:
At the Trenchard Oaks apartment complex, a two-bedroom apartment costs 50% more to rent than a one-bedroom apartment. If Alex were to rent a two-bedroom apartment for x months it would cost him the same amount as it would to rent a one-bedroom for 12 months. What is x ?

A. 6
B. 8
C. 9
D. 10
E. 18

$$? = x$$

Trivial application of UNITS CONTROL, one of the most powerful tools of our course:

$$\left. \matrix{ {\rm{one - bed}}\,\,\,:\,\,\,\,{{\ \,\,2d} \over {1\,\,{\rm{month}}\,}}\,\,\,\,\,\,\,\, \to \,\,\,\,\,\,12\,\,{\rm{months}}\,\,\,\left( {{{\ \,\,2d} \over {1\,\,{\rm{month}}\,}}} \right)\,\,\, = \,\,\,\ \,\,24d\,\,\,\,\, \hfill \cr {\rm{two - bed}}\,\,:\,\,\,{{\ \,\,3d} \over {\,1\,\,{\rm{month}}\,}}\,\,\,\,\,\,\,\, \to \,\,\,\,\,\,x\,\,{\rm{months}}\,\,\,\left( {{{\ \,\,3d} \over {1\,\,{\rm{month}}\,}}} \right)\,\,\, = \,\,\,\ \,\,3xd \hfill \cr} \right\}\,\,\,\,\,\,\,\mathop \Rightarrow \limits^{{\rm{stem}}} \,\,\,\,\,\,\,24d = 3xd\,\,\,\,\,\,\mathop \Rightarrow \limits^{d\,\, \ne \,\,0} \,\,\,\,\,\,\,? = x = 8$$

This solution follows the notations and rationale taught in the GMATH method.

Regards,
Fabio.
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Re: At the Trenchard Oaks apartment complex, a two-bedroom apartment costs  [#permalink]

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24 Feb 2019, 06:54
Bunuel wrote:
At the Trenchard Oaks apartment complex, a two-bedroom apartment costs 50% more to rent than a one-bedroom apartment. If Alex were to rent a two-bedroom apartment for x months it would cost him the same amount as it would to rent a one-bedroom for 12 months. What is x ?

A. 6
B. 8
C. 9
D. 10
E. 18

We can let the cost to rent a one-bedroom apartment per month = n. Therefore, the cost for a two-bedroom apartment per month = 1.5n; thus:

1.5nx = 12n

1.5x = 12

x = 8

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Re: At the Trenchard Oaks apartment complex, a two-bedroom apartment costs   [#permalink] 24 Feb 2019, 06:54
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