D.S : GMAT Problem Solving (PS)

D.S

Oldest

Best Reply

Author

Message

TAGS:

Manager

Joined: 09 Jun 2010

Posts: 78

Followers: 1

Kudos [?]: 0 [0], given: 17

D.S [#permalink]

29 Jul 2010, 23:37

00:00

Question Stats:

100% (01:43) correct

0% (00:00) wrong

based on 0 sessions

240,120,60,30

In the sequnce above, each term after the first 1/2 of the preceding term. What is the least term of the sequnce is greater than 1 ?

a 32/15
b 16/15
c 15/8
d 15/4
e 15/2

pleas help with a formula

GMAT Club team member

Joined: 02 Sep 2009

Posts: 11599

Followers: 1800

Kudos [?]: 9592 [0], given: 828

Re: D.S [#permalink]

29 Jul 2010, 23:57

xmagedo wrote:

There is no need for formula:
240, 120, 60, 30, 30/2, 30/4, 30/8, 30/16, 30/32<1. So the leas term more than 1 is 30/16=15/8.

But still if you need: \frac{30}{2^n}>1, where n is integer --> 2^n<30 --> n<5 --> n=4 --> \frac{30}{2^n}=\frac{30}{2^4}=\frac{15}{8}.

Answer: C.
_________________

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. NEW!!!

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!

What are GMAT Club Tests?
25 extra-hard Quant Tests

Find out what's new at GMAT Club - latest features and updates

Re: D.S [#permalink] 29 Jul 2010, 23:57

	Similar topics	Author	Replies	Last post
Similar Topics:	ds	mirhaque	3	18 Feb 2004, 15:15
	ds	mirhaque	2	11 Apr 2004, 16:31
	DS	Bhai	5	23 Jun 2004, 20:53
	ds	sakshi	2	16 Jan 2005, 22:38
	ds	mirhaque	5	23 Mar 2005, 06:54

D.S

Main navigation

GMAT Resources

Partners

MBA Resources

GMAT ® is a registered trademark of the Graduate Management Admission Council ® (GMAC ®). GMAT Club's website has not been reviewed or endorsed by GMAC.

GMAT Courses

Admissions Consulting

D.S

D.S

Main navigation

GMAT Resources

Partners

MBA Resources