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#### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here. # Series F is defined as F n = F (n – 1) + 3 and F 1 = 10.  Question banks Downloads My Bookmarks Reviews Important topics
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Moderator  Joined: 18 Apr 2015
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Series F is defined as F n = F (n – 1) + 3 and F 1 = 10. [#permalink]
Expert's post 00:00

Question Stats: 53% (01:45) correct 46% (01:45) wrong based on 32 sessions

Series F is defined as F n = F(n – 1) + 3 and F 1 = 10.

 Quantity A Quantity B The sum of F 4 through F 10 The sum of F 6 through F 11

A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

_________________ Director Joined: 03 Sep 2017
Posts: 521
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Kudos [?]: 344  , given: 66

Re: Series F is defined as F n = F (n – 1) + 3 and F 1 = 10. [#permalink]
2
KUDOS
The sequence is an arithmetic progression where each term is the precedent plus 3.

Moreover, one can notice that the two columns have many elements in common, since

QA: F4+F5+F6+F7+F8+F9+F10
QB: F6+F7+F8+F9+F10+F11

Thus, we can simplify the comparison to

QA: F4+F5
QB: F11

Now, since each term is three away from the preceding one, we can compute our three terms: F4= F1+3*3 = 19; F5 = F4+3 = 21 and F11 = F5 + 6*3 = 39.

Now QA = 19+21 = 40 and QB = 39.

Quantity A is greater! Re: Series F is defined as F n = F (n – 1) + 3 and F 1 = 10.   [#permalink] 11 Oct 2017, 05:53
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# Series F is defined as F n = F (n – 1) + 3 and F 1 = 10.  Question banks Downloads My Bookmarks Reviews Important topics Powered by phpBB © phpBB Group Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.