Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 01 Aug 2014, 20:32

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

From MitDavidDv: Prime Factor Question

Author Message
TAGS:
Manager
Joined: 28 Jan 2011
Posts: 77
Location: Tennessee
Schools: Belmont University
Followers: 1

Kudos [?]: 11 [0], given: 56

From MitDavidDv: Prime Factor Question [#permalink]  01 Jun 2011, 12:10
00:00

Difficulty:

5% (low)

Question Stats:

50% (01:14) correct 50% (00:19) wrong based on 10 sessions
What is the sum of the different positive prime factors of 550?
A. 10
B. 11
C. 15
D. 16
E. 18
Math Forum Moderator
Joined: 20 Dec 2010
Posts: 2048
Followers: 127

Kudos [?]: 888 [1] , given: 376

Re: From MitDavidDv: Prime Factor Question [#permalink]  01 Jun 2011, 12:40
1
KUDOS
MitDavidDv wrote:
What is the sum of the different positive prime factors of 550?
A. 10
B. 11
C. 15
D. 16
E. 18

550=275*2=25*11*2=5*5*11*2=5^2*11*2

Different prime numbers are 5, 11 and 2.

Sum=5+11+2=18

Ans: "E"
_________________
Manager
Joined: 28 Jan 2011
Posts: 77
Location: Tennessee
Schools: Belmont University
Followers: 1

Kudos [?]: 11 [0], given: 56

Re: From MitDavidDv: Prime Factor Question [#permalink]  01 Jun 2011, 13:10
Shalom!

550= 5^2+2+11=18
The prime factors are 5, 2 and 11 therefore the answer is E.
Director
Joined: 01 Feb 2011
Posts: 770
Followers: 14

Kudos [?]: 81 [0], given: 42

Re: From MitDavidDv: Prime Factor Question [#permalink]  01 Jun 2011, 14:08
different prime factors of 550 are 2 , 5, 11

=> sum of prime factors = 2+5+11 = 18

Re: From MitDavidDv: Prime Factor Question   [#permalink] 01 Jun 2011, 14:08
Similar topics Replies Last post
Similar
Topics:
2 From MitDavidDv: GMAT Preparation Question 2 01 Jun 2011, 13:19
2 From MitDavidDv: Problem Solving Question 3 01 Jun 2011, 12:31
1 From MitDavidDv: Test Day Question 2 20 May 2011, 09:46
2 From MitDavidDv: GMAT Quant-Math Question #2 5 07 Apr 2011, 14:43
1 From MitDavidDv: GMAT Quant-Math Question 5 07 Apr 2011, 13:20
Display posts from previous: Sort by