GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Feb 2019, 20:05

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 in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
  • Online GMAT boot camp for FREE

     February 21, 2019

     February 21, 2019

     10:00 PM PST

     11:00 PM PST

    Kick off your 2019 GMAT prep with a free 7-day boot camp that includes free online lessons, webinars, and a full GMAT course access. Limited for the first 99 registrants! Feb. 21st until the 27th.
  • Free GMAT RC Webinar

     February 23, 2019

     February 23, 2019

     07:00 AM PST

     09:00 AM PST

    Learn reading strategies that can help even non-voracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT

Peter, Mary, and Edna took the same examination. Which of them receive

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

Hide Tags

 
Senior RC Moderator
User avatar
V
Status: Preparing GMAT
Joined: 02 Nov 2016
Posts: 2251
Location: Pakistan
GPA: 3.39
Premium Member CAT Tests
Peter, Mary, and Edna took the same examination. Which of them receive  [#permalink]

Show Tags

New post 03 Feb 2018, 10:15
1
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

83% (00:46) correct 17% (01:46) wrong based on 34 sessions

HideShow timer Statistics

Peter, Mary, and Edna took the same examination. Which of them received the highest score?

(1) There was a 10-point gap between Peter's score and Mary's score.
(2) There was an 8-point gap between Edna's score and Peter's score.

_________________

New Project RC Butler 2019 - Practice 2 RC Passages Everyday
Final days of the GMAT Exam? => All GMAT Flashcards.
This Post Helps = Press +1 Kudos
Best of Luck on the GMAT!!

Senior PS Moderator
User avatar
V
Joined: 26 Feb 2016
Posts: 3340
Location: India
GPA: 3.12
Premium Member
Re: Peter, Mary, and Edna took the same examination. Which of them receive  [#permalink]

Show Tags

New post 04 Feb 2018, 03:53
Peter, Mary, and Edna took the same examination. Which of them received the highest score?

(1) There was a 10-point gap between Peter's score and Mary's score.
We have no information about the relationship between Peter's score and Edna's score (Insufficient)
(2) There was an 8-point gap between Edna's score and Peter's score.
We have no information about the relationship between Peter's score and Mary's score (Insufficient)

However, on combining the information from both the statements,
we are only told about the gap in their scores, but we cannot clearly
come to a conclusion about who scores the highest score.

Case 1: Peter's score - 90 | Mary's score - 100 | Edna's score - 98
Here, Peter has the highest score
Case 2: Peter's score - 90 | Mary's score - 80 | Edna's score - 98
Here, Edna has the highest score (Insufficient - Option E)
_________________

You've got what it takes, but it will take everything you've got

Math Revolution GMAT Instructor
User avatar
V
Joined: 16 Aug 2015
Posts: 6981
GMAT 1: 760 Q51 V42
GPA: 3.82
Premium Member
Re: Peter, Mary, and Edna took the same examination. Which of them receive  [#permalink]

Show Tags

New post 06 Feb 2018, 22:05
1
SajjadAhmad wrote:
Peter, Mary, and Edna took the same examination. Which of them received the highest score?

(1) There was a 10-point gap between Peter's score and Mary's score.
(2) There was an 8-point gap between Edna's score and Peter's score.


Forget conventional ways of solving math questions. For DS problems, the VA (Variable Approach) method is the quickest and easiest way to find the answer without actually solving the problem. Remember that equal numbers of variables and independent equations ensure a solution.

Since we have 3 variables (x and y) and 0 equations, E is most likely to be the answer. So, we should consider 1) & 2) first.

Condition 1) & 2):
Let P, M and E be scores of Peter, Mary and Edna, respectively.

|P-M| = 10 from the condition 1)
|E-P| = 8 from the condition 2)

P = 100, M = 90, E = 92: Peter received the highest score.
P = 90, M = 100, E = 98: Mary received the highest score.

Since we don't have a unique solution, both conditions together are not sufficient.

Therefore, the answer is E.

Normally, in problems which require 2 equations, such as those in which the original conditions include 2 variables, or 3 variables and 1 equation, or 4 variables and 2 equations, each of conditions 1) and 2) provide an additional equation. In these problems, the two key possibilities are that C is the answer (with probability 70%), and E is the answer (with probability 25%). Thus, there is only a 5% chance that A, B or D is the answer. This occurs in common mistake types 3 and 4. Since C (both conditions together are sufficient) is the most likely answer, we save time by first checking whether conditions 1) and 2) are sufficient, when taken together. Obviously, there may be cases in which the answer is A, B, D or E, but if conditions 1) and 2) are NOT sufficient when taken together, the answer must be E.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $149 for 3 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"

GMAT Club Bot
Re: Peter, Mary, and Edna took the same examination. Which of them receive   [#permalink] 06 Feb 2018, 22:05
Display posts from previous: Sort by

Peter, Mary, and Edna took the same examination. Which of them receive

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


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.