Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack
GMAT Club

 It is currently 30 Mar 2017, 04:18

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In a sequence of numbers in which each term after the first

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Senior Manager
Joined: 27 Aug 2007
Posts: 253
Followers: 1

Kudos [?]: 12 [0], given: 0

In a sequence of numbers in which each term after the first [#permalink]

### Show Tags

25 Sep 2007, 06:32
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

In a sequence of numbers in which each term after the first term is 1 more than twice the preceding term, what is the fifth term?

(1) The first term is 1.
(2) The sixth term minus the fifth term is 32.
VP
Joined: 08 Jun 2005
Posts: 1145
Followers: 7

Kudos [?]: 198 [0], given: 0

### Show Tags

25 Sep 2007, 09:26
n
2n+1
2*(2n+1)+1 = 4n+3
2*(4n+3)+1 = 8n+7
2*(8n+7)+1 = 16n+15
2*(16n+15)+1 = 32n+31

statement 1

if n=1 then 16n+15 = 31

sufficient

statement 2

32n+31-(16n+15) = 32

32n+31-16n-15 = 32

16n+16 = 32

16n = 16

n = 1

if n=1 then 16n+15 = 31

sufficient

the answer is (D)

Senior Manager
Joined: 27 Aug 2007
Posts: 253
Followers: 1

Kudos [?]: 12 [0], given: 0

### Show Tags

25 Sep 2007, 09:36
Thank you KillerSquirrel !!!

I see where I did a mistake, Keep it UP!!!

CEO
Joined: 29 Mar 2007
Posts: 2575
Followers: 20

Kudos [?]: 436 [0], given: 0

Re: In a sequence of numbers... [#permalink]

### Show Tags

25 Sep 2007, 20:16
Ferihere wrote:
In a sequence of numbers in which each term after the first term is 1 more than twice the preceding term, what is the fifth term?

(1) The first term is 1.
(2) The sixth term minus the fifth term is 32.

Sequence:

n
1+2n
3+4n<------2(1+2n)+1
7+8n<------2(2(1+2n)+1)+1
15+16n<------2(2(2(1+2n)+1)+1)+1
31+32n<2> 16+16n=32 16n=16 ---> n=1

so 5th term:

15+16(1) = 31.

Ans D.

No reason to really do all that work though b/c a lot of room for error, just know u could have done it and save 3min =)
Re: In a sequence of numbers...   [#permalink] 25 Sep 2007, 20:16
Display posts from previous: Sort by

# In a sequence of numbers in which each term after the first

 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®.