It is currently 21 Nov 2017, 01:31

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

M24-18

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 42278

Kudos [?]: 132880 [0], given: 12390

M24-18 [#permalink]

Show Tags

New post 16 Sep 2014, 01:21
Expert's post
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

80% (00:51) correct 20% (00:27) wrong based on 15 sessions

HideShow timer Statistics

Kudos [?]: 132880 [0], given: 12390

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 42278

Kudos [?]: 132880 [0], given: 12390

Re M24-18 [#permalink]

Show Tags

New post 16 Sep 2014, 01:21
Expert's post
1
This post was
BOOKMARKED

Kudos [?]: 132880 [0], given: 12390

Intern
Intern
avatar
Joined: 21 Jan 2015
Posts: 21

Kudos [?]: 5 [0], given: 11

GMAT ToolKit User Premium Member
Re: M24-18 [#permalink]

Show Tags

New post 23 Aug 2015, 08:54
I think this is a poor-quality question and I agree with explanation. I was confused by the stem. Is it possible to make it more obvious that we are supposed to find consecutive integers from 1 to 49 and not some fancy exponents ?
sorry, I might be tired from GMAT :)

Kudos [?]: 5 [0], given: 11

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 42278

Kudos [?]: 132880 [0], given: 12390

Re: M24-18 [#permalink]

Show Tags

New post 23 Aug 2015, 10:32
Barnal wrote:
I think this is a poor-quality question and I agree with explanation. I was confused by the stem. Is it possible to make it more obvious that we are supposed to find consecutive integers from 1 to 49 and not some fancy exponents ?
sorry, I might be tired from GMAT :)


Edited as suggested. Hope it's better now.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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. ,11 Mixed Questions, 12 Fresh Meat

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., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 132880 [0], given: 12390

Manager
Manager
User avatar
B
Joined: 15 Nov 2016
Posts: 62

Kudos [?]: 15 [0], given: 76

Concentration: General Management, Leadership
CAT Tests
Re: M24-18 [#permalink]

Show Tags

New post 10 Oct 2017, 05:26
What is 1+2+3+...+..+48+49 ?

A. 1168
B. 1176
C. 1195
D. 1215
E. 1225

An alternate approach:

Average = sum of integers x No. of integers

Average = Last term + First term / 2

Average = 25
No of terms = 49

25x49=1225

E is the answer.

Kudos [?]: 15 [0], given: 76

Intern
Intern
avatar
B
Joined: 02 Feb 2016
Posts: 19

Kudos [?]: 4 [0], given: 54

Premium Member CAT Tests
Re: M24-18 [#permalink]

Show Tags

New post 10 Oct 2017, 06:00
Sum of consecutive integers (starting at 1): n(n+1)/2

49(49+1)/2 = 49*50/2 = 1225


Sent from my iPhone using GMAT Club Forum

Kudos [?]: 4 [0], given: 54

Re: M24-18   [#permalink] 10 Oct 2017, 06:00
Display posts from previous: Sort by

M24-18

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: Bunuel, chetan2u



GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.