Set A contains all the even numbers..... : PS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 24 Jan 2017, 06:03

### 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

# Set A contains all the even numbers.....

Author Message
Manager
Joined: 22 Sep 2010
Posts: 92
Followers: 2

Kudos [?]: 150 [0], given: 0

Set A contains all the even numbers..... [#permalink]

### Show Tags

08 Oct 2010, 04:39
00:00

Difficulty:

(N/A)

Question Stats:

25% (02:44) correct 75% (00:48) wrong based on 5 sessions

### HideShow timer Statistics

Set A contains all the even numbers between 2 and 50 inclusive. Set B contains all the even numbers between 102 and 150 inclusive. What is the difference between the sum of elements of set B and that of set A?

A. 2500
B. 5050
C. 11325
D. 6275
E. 2550
Manager
Joined: 22 Jun 2010
Posts: 57
Followers: 1

Kudos [?]: 52 [0], given: 10

Re: Set A contains all the even numbers..... [#permalink]

### Show Tags

08 Oct 2010, 04:49
pzazz12 wrote:
Set A contains all the even numbers between 2 and 50 inclusive. Set B contains all the even numbers between 102 and 150 inclusive. What is the difference between the sum of elements of set B and that of set A?

A. 2500
B. 5050
C. 11325
D. 6275
E. 2550

Sum of an evenly spaced set = first term + last term/2 * number of terms

Set A = (2 + 50)/2 * 25 = 26 x 25 (do not calculate yet!)
Set B = (102 + 150)/2 * 25 = 126 x 25

Now you see, the difference is exactly 100 x 25 = 2500

Cheers,
André
Manager
Joined: 08 Sep 2010
Posts: 232
Location: India
WE 1: 6 Year, Telecom(GSM)
Followers: 4

Kudos [?]: 251 [0], given: 21

Re: Set A contains all the even numbers..... [#permalink]

### Show Tags

08 Oct 2010, 05:53

2+4+6+......+50

102+104+106+....+150=(100+100+100+.....till 25th term)+(2+4+6+......+50)= 2500+ 1st one
Re: Set A contains all the even numbers.....   [#permalink] 08 Oct 2010, 05:53
Display posts from previous: Sort by