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

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

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New post 30 Aug 2018, 20:52
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Difficulty:

  25% (medium)

Question Stats:

75% (04:33) correct 25% (01:12) wrong based on 108 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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New post 30 Aug 2018, 21:03
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,
answer is B

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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New post 30 Aug 2018, 21:54
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
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Re: At the Trenchard Oaks apartment complex, a two-bedroom apartment costs  [#permalink]

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New post 15 Nov 2018, 22:28
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:

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

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New post 20 Dec 2018, 06:22
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 &nbs [#permalink] 20 Dec 2018, 06:22
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