difficult series sum!!!

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by [email protected] » Sat Oct 08, 2011 10:40 pm

Fabio's designer fashion store has become so popular that he can raise the prices every day. Each day, he raises the price of his designer pants by one dollar more than he raised it the previous day. Given that the price on Sunday the 15th was $700, what was the price on Saturday the 21st?

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Source: Beat The GMAT — Data Sufficiency | Sat Oct 08, 2011 10:40 pm

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Sun Oct 09, 2011 7:01 am

[email protected] wrote:Fabio's designer fashion store has become so popular that he can raise the prices every day. Each day, he raises the price of his designer pants by one dollar more than he raised it the previous day. Given that the price on Sunday the 15th was $700, what was the price on Saturday the 21st?

I think you're missing part of the question - unless I'm missing something.

Also, what are the answer choices? In many instances, the best (i.e., fastest) approach involves working with the answer choices.

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

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parul9: Master | Next Rank: 500 Posts; Posts: 197; Joined: Thu Sep 15, 2011 10:22 amFollowed by: 2 members; Thanked: 6 times

by parul9 » Sun Oct 09, 2011 7:34 am

Brent@GMATPrepNow wrote:
[email protected] wrote:Fabio's designer fashion store has become so popular that he can raise the prices every day. Each day, he raises the price of his designer pants by one dollar more than he raised it the previous day. Given that the price on Sunday the 15th was $700, what was the price on Saturday the 21st?
I think you're missing part of the question - unless I'm missing something.
Also, what are the answer choices? In many instances, the best (i.e., fastest) approach involves working with the answer choices.

Cheers,
Brent

I was watching this topic!
Thank God you replied and felt the same as I did!
There should be a missing piece somewhere!

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