A man saves $4 more each year than the preceding year. If : PS Archive Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack  It is currently 17 Jan 2017, 17:06 ### GMAT Club Daily Prep #### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email. Customized for You we will pick new questions that match your level based on your Timer History Track Your Progress every week, we’ll send you an estimated GMAT score based on your performance Practice Pays we will pick new questions that match your level based on your Timer History #### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here. ### Request Expert Reply # Events & Promotions ###### Events & Promotions in June Open Detailed Calendar # A man saves$ 4 more each year than the preceding year. If

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Director
Joined: 24 Oct 2005
Posts: 659
Location: London
Followers: 1

Kudos [?]: 14 [0], given: 0

A man saves $4 more each year than the preceding year. If [#permalink] ### Show Tags 28 Nov 2005, 02:10 00:00 Difficulty: (N/A) Question Stats: 0% (00:00) correct 0% (00:00) wrong based on 0 sessions ### HideShow timer Statistics This topic is locked. If you want to discuss this question please re-post it in the respective forum. A man saves$ 4 more each year than the preceding year. If he saves Rs 20 in the first year, after how many years will his savings amount to $1064? a) 10 b) 12 c) 18 d) 19 Director Joined: 14 Sep 2005 Posts: 993 Location: South Korea Followers: 2 Kudos [?]: 155 [0], given: 0 ### Show Tags 28 Nov 2005, 03:38 A man saves$ 4 more each year than the preceding year. If he saves Rs 20 in the first year, after how many years will his savings amount to $1064? A(n) = A(n-1) + 4 A(1) = 20 A(2) = 20 + 4 A(3) = 20 + 4 + 4 A(4) = 20 + 4 + 4 + 4 . . . A(N) = 20 + 4(N - 1) A(1) + A(2) + A(3) + A(4) + ... + A(N) = (20 * N) + 4(0 + 1 + 2 + 3 + ... + N-1) = (20 * N) + 4( (N-1)N/2 ) = (20 * N) + 2(N^2) - 2N = 2(N^2) + 18N = 1064 N^2 + 9N = 532 N^2 + 9N - 532 = 0 (N-19)(N+28)=0 N=19 or N=-28 A year must be positive. Thus, he needs to save for 19 years. (E) it is. _________________ Auge um Auge, Zahn um Zahn ! 28 Nov 2005, 03:38 Display posts from previous: Sort by # A man saves$ 4 more each year than the preceding year. If

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.