riddle?

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linfongyu: Senior | Next Rank: 100 Posts; Posts: 80; Joined: Thu Jan 31, 2008 9:15 pm; Thanked: 2 times

by linfongyu » Sat Feb 02, 2008 10:25 am

nancy, karen, and paul rent an apartment for $900. if karen agrees to pay twice as much as paul and nancy agrees to pay twice as much as karen, how much must karen pay?

a. $100
b. $200
c. $300
d. $450
3. $600

let paul = x
karen = 2x
nancy = 4x
x + 2x + 4x = $900
i can't solve! what am i missing? is this like a sick and twisted riddle?

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Source: Beat The GMAT — Problem Solving | Sat Feb 02, 2008 10:25 am

cris: Master | Next Rank: 500 Posts; Posts: 128; Joined: Sat Nov 17, 2007 11:59 am; Thanked: 1 times

by cris » Sat Feb 02, 2008 11:35 am

I get karen 257...

I cant find an answer from the ones you posted.

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Stuart@KaplanGMAT: GMAT Instructor; Posts: 3225; Joined: Tue Jan 08, 2008 2:40 pmFollowed by: 614 members; Location: Toronto; Thanked: 1710 times; GMAT Score:800

by Stuart@KaplanGMAT » Sat Feb 02, 2008 1:23 pm

There must be a typo in the question - try backsolving all 5 choices, none give you total rent of $900.

If the total rent were $700, then the answer would be $200 for Karen (so if (b) is the correct answer, that's how the question should have read).

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

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resilient: Legendary Member; Posts: 789; Joined: Sun May 06, 2007 1:25 amFollowed by: 6 members; Location: Southern California, USA; Thanked: 15 times

translation perspective

by resilient » Tue Feb 05, 2008 1:37 am

what is the best way to set this up? i got n+k+P= 900, k=2p, and n=2x. Am i on the right track would this help the situation out at all?

Appetite for 700 and I scraped my plate!

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