Last visit was: 16 May 2026, 09:59 It is currently 16 May 2026, 09:59
Home
Messages
Tests
Schools
Events
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
 1   2   3   
Sub 505 (Easy)|   Combinations|                                       
User avatar
sarb
User avatar
Joined: 12 May 2012
Last visit: 27 Aug 2012
Posts: 15
Own Kudos:
1,603
 [225]
Given Kudos: 19
Location: United States
Concentration: Technology, Human Resources
Posts: 15
Kudos: 1,603
 [225]
There are 8 teams in a certain league and each team plays each of the Updated on: 26 Feb 2019, 04:29
Originally posted by sarb on 17 Jun 2012, 03:52.
Last edited by Bunuel on 26 Feb 2019, 04:29, edited 2 times in total.
Renamed the topic.
23
Kudos
Add Kudos
202
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

5% (low)

Question Stats:

83% (00:57) correct 17% (01:05) wrong based on 6892 sessions

History

Date
Time
Result
Not Attempted Yet
There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

A. 15
B. 16
C. 28
D. 56
E. 64
ShowHide Answer
Official Answer
C
If this question felt shaky, try an adaptive mini quiz of similar problems in GMAT Club Forum Quiz →. Free plan gives 5 questions per day.
Most Helpful Reply
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 16 May 2026
Posts: 110,451
Own Kudos:
815,205
 [69]
Given Kudos: 106,268
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 110,451
Kudos: 815,205
 [69]
There are 8 teams in a certain league and each team plays each of the 16 Nov 2012, 04:19
13
Kudos
Add Kudos
56
Bookmarks
Bookmark this Post
Sachin9
Bunuel
sarb
There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

A. 15
B. 16
C. 28
D. 56
E. 64

The total # of games played would be equal to the # of different pairs possible from 8 teams, which is \(C^2_{8}=28\).

Answer: C.

P.S. Please read and follow: https://gmatclub.com/forum/rules-for-pos ... 33935.html Pay attention ot the points #3 and #8.
I would like to learn about \(C^2_{8}=28\). Manhattan Book doesn't discuss this approach. They have anagram approach.
Show more

Well, the game is played by 2 teams. How many games are needed if there are 8 teams and each team plays each of the other teams exactly once? The number of games will be equal to the number of different pairs of 2 teams we can form out of 8 teams (one game per pair). How else?

Similar questions to practice:
https://gmatclub.com/forum/how-many-diag ... 01540.html
https://gmatclub.com/forum/if-10-persons ... 10622.html
https://gmatclub.com/forum/10-business-e ... 26163.html
https://gmatclub.com/forum/how-many-diff ... 29992.html
https://gmatclub.com/forum/15-chess-play ... 55939.html
https://gmatclub.com/forum/there-are-5-c ... 27235.html
https://gmatclub.com/forum/if-each-parti ... 42222.html

Hope it helps.
User avatar
EMPOWERgmatRichC
User avatar
Major Poster
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,777
Own Kudos:
13,079
 [40]
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,777
Kudos: 13,079
 [40]
There are 8 teams in a certain league and each team plays each of the 12 Jan 2015, 14:46
32
Kudos
Add Kudos
8
Bookmarks
Bookmark this Post
Hi All,

Using the Combination Formula IS one way to approach these types of questions, but it's not the only way. Sometimes the easiest way to get to a solution on Test Day is to just draw a little picture and keep track of the possibilities....

Let's call the 8 teams: ABCD EFGH

We're told that each team plays each other team JUST ONCE.

Start with team A....
A plays BCD EFGH = 7 games total

Team B has ALREADY played team A, so those teams CANNOT play again...
B plays CD EFGH = 6 more games

Team C has ALREADY played teams A and B, so the following games are left...
C plays D EFGH = 5 more games

At this point, you should notice a pattern: the additional number of games played is reduced by 1 each time. So what we really have is:

7 + 6 + 5 + 4 + 3 + 2 + 1 + 0 = 28 games played

Final Answer:
Show Spoiler
C

GMAT assassins aren't born, they're made,
Rich
User avatar
thangvietname
User avatar
Joined: 09 Jun 2010
Last visit: 28 Jun 2017
Posts: 514
Own Kudos:
574
 [36]
Given Kudos: 916
Posts: 514
Kudos: 574
 [36]
There are 8 teams in a certain league and each team plays each of the 31 Jan 2013, 01:37
26
Kudos
Add Kudos
10
Bookmarks
Bookmark this Post
it is not easy and is harder if we are on the test date.

there are 8 team
to take out 2 teams, IF ORDER MATTERS we have 8*7
but in fact order does not matter

8*7/2=28

princeton gmat book explain this point wonderfully.
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 16 May 2026
Posts: 110,451
Own Kudos:
815,205
 [20]
Given Kudos: 106,268
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 110,451
Kudos: 815,205
 [20]
There are 8 teams in a certain league and each team plays each of the 17 Jun 2012, 03:57
12
Kudos
Add Kudos
8
Bookmarks
Bookmark this Post
sarb
There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

A. 15
B. 16
C. 28
D. 56
E. 64
Show more

The total # of games played would be equal to the # of different pairs possible from 8 teams, which is \(C^2_{8}=28\).

Answer: C.

P.S. Please read and follow: rules-for-posting-please-read-this-before-posting-133935.html Pay attention ot the points #3 and #8.
General Discussion
User avatar
Sachin9
User avatar
Joined: 22 Jul 2012
Last visit: 25 Dec 2015
Posts: 349
Own Kudos:
175
Given Kudos: 562
Status:Gonna rock this time!!!
Location: India
GMAT 1: 640 Q43 V34
GMAT 2: 630 Q47 V29
WE:Information Technology (Computer Software)
GMAT 2: 630 Q47 V29
Posts: 349
Kudos: 175
There are 8 teams in a certain league and each team plays each of the 14 Nov 2012, 06:23
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
sarb
There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

A. 15
B. 16
C. 28
D. 56
E. 64

The total # of games played would be equal to the # of different pairs possible from 8 teams, which is \(C^2_{8}=28\).

Answer: C.

P.S. Please read and follow: rules-for-posting-please-read-this-before-posting-133935.html Pay attention ot the points #3 and #8.
Show more
I would like to learn about \(C^2_{8}=28\). Manhattan Book doesn't discuss this approach. They have anagram approach.
User avatar
pranav123
User avatar
Joined: 18 Oct 2012
Last visit: 17 Dec 2014
Posts: 4
Own Kudos:
31
 [10]
Given Kudos: 9
Posts: 4
Kudos: 31
 [10]
There are 8 teams in a certain league and each team plays each of the 18 Nov 2012, 21:09
7
Kudos
Add Kudos
3
Bookmarks
Bookmark this Post
These type of problems can be solved with a simple diagram.

1. Draw a table consisting of 8 columns and 8 rows.
2. Divide the table by a diagonal and count the number of spaces including the half spaces only on one side of the diagonal.
3. The number should be 28.


I tried uploading the diagram but unsuccessful.
avatar
mywaytomba
avatar
Joined: 14 Jan 2013
Last visit: 01 Dec 2014
Posts: 3
Own Kudos:
7
 [2]
Given Kudos: 54
Location: Austria
Posts: 3
Kudos: 7
 [2]
There are 8 teams in a certain league and each team plays each of the 16 May 2013, 01:13
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel


The total # of games played would be equal to the # of different pairs possible from 8 teams, which is \(C^2_{8}=28\).
Show more

Hi Bunuel,

I have seen that you are using this formula/approach to solve most of the combination questions. Could you please explain, in general, how do you use this formula?

Thanks a lot.
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 16 May 2026
Posts: 110,451
Own Kudos:
815,205
 [14]
Given Kudos: 106,268
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 110,451
Kudos: 815,205
 [14]
There are 8 teams in a certain league and each team plays each of the 16 May 2013, 04:33
1
Kudos
Add Kudos
13
Bookmarks
Bookmark this Post
mywaytomba
Bunuel


The total # of games played would be equal to the # of different pairs possible from 8 teams, which is \(C^2_{8}=28\).

Hi Bunuel,

I have seen that you are using this formula/approach to solve most of the combination questions. Could you please explain, in general, how do you use this formula?

Thanks a lot.
Show more

Check combinatorics chapter of Math Book for theory: math-combinatorics-87345.html

Also check some questions on combinations to practice:
DS: search.php?search_id=tag&tag_id=31
PS: search.php?search_id=tag&tag_id=52

Hard questions on combinations and probability with detailed solutions: hardest-area-questions-probability-and-combinations-101361.html (there are some about permutation too)

Hope it helps.
User avatar
theGame001
User avatar
Joined: 13 Jul 2013
Last visit: 27 Jul 2015
Posts: 51
Own Kudos:
48
Given Kudos: 21
GMAT 1: 570 Q46 V24
GMAT 1: 570 Q46 V24
Posts: 51
Kudos: 48
There are 8 teams in a certain league and each team plays each of the 26 Dec 2013, 23:04
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Lets assume the question asks There are 8 teams in a certain league and each team
plays each of the other teams exactly twice. If each
game is played by 2 teams, what is the total number
of games played?

Then is 28*2 the correct approach?
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 16 May 2026
Posts: 110,451
Own Kudos:
815,205
 [15]
Given Kudos: 106,268
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 110,451
Kudos: 815,205
 [15]
There are 8 teams in a certain league and each team plays each of the 27 Dec 2013, 03:08
3
Kudos
Add Kudos
12
Bookmarks
Bookmark this Post
theGame001
Lets assume the question asks There are 8 teams in a certain league and each team
plays each of the other teams exactly twice. If each
game is played by 2 teams, what is the total number
of games played?

Then is 28*2 the correct approach?
Show more

Yes. Check here: 15-chess-players-take-part-in-a-tournament-every-player-55939.html and here: there-are-8-teams-in-a-certain-league-and-each-team-plays-132366.html

Similar questions to practice:
how-many-diagonals-does-a-polygon-with-21-sides-have-if-one-101540.html
if-10-persons-meet-at-a-reunion-and-each-person-shakes-hands-110622.html
10-business-executives-and-7-chairmen-meet-at-a-conference-126163.html
how-many-different-handshakes-are-possible-if-six-girls-129992.html
15-chess-players-take-part-in-a-tournament-every-player-55939.html
there-are-5-chess-amateurs-playing-in-villa-s-chess-club-127235.html
if-each-participant-of-a-chess-tournament-plays-exactly-one-142222.html
there-are-8-teams-in-a-certain-league-and-each-team-plays-134582.html
there-are-8-teams-in-a-certain-league-and-each-team-plays-132366.html
in-a-kickball-competition-of-9-teams-how-many-possible-ma-161846.html

Hope it helps.
avatar
quentin.louviot
avatar
Joined: 20 Sep 2014
Last visit: 22 May 2015
Posts: 4
Own Kudos:
18
 [10]
Given Kudos: 49
Posts: 4
Kudos: 18
 [10]
There are 8 teams in a certain league and each team plays each of the Updated on: 13 Jan 2015, 07:51
Originally posted by quentin.louviot on 26 Nov 2014, 02:14.
Last edited by quentin.louviot on 13 Jan 2015, 07:51, edited 2 times in total.
6
Kudos
Add Kudos
3
Bookmarks
Bookmark this Post
SreeViji
Hi Bunnel,

I would also like to learn this approach. Can u help me?

Sree
Show more


Hey SreeViji,

I think i have something to help you.
The answer here is the combination 8C2 (8 teams Choose 2) which mean \frac{8!}{6!x2!} --> \frac{8x7}{2}

To understand that we just have to think that each of the 8 team plays against 7 other (8x7) but they play each team exactly once so we divide the total by 2.

We divide by 2 because "TEAM A VS TEAM B" is the same as "TEAM B VS TEAM A"

So we end up with \frac{8x7}{2}= 28

If you still have trouble with combination and permutation check out this website it's well done,
https://www.mathsisfun.com/combinatorics ... tions.html

hope it helps.
User avatar
onedayill
User avatar
Joined: 25 Feb 2010
Last visit: 08 Mar 2017
Posts: 207
Own Kudos:
341
Given Kudos: 10
Posts: 207
Kudos: 341
There are 8 teams in a certain league and each team plays each of the 19 May 2015, 07:31
Kudos
Add Kudos
Bookmarks
Bookmark this Post
pranav123
These type of problems can be solved with a simple diagram.

1. Draw a table consisting of 8 columns and 8 rows.
2. Divide the table by a diagonal and count the number of spaces including the half spaces only on one side of the diagonal.
3. The number should be 28.


I tried uploading the diagram but unsuccessful.
Show more

Hi,

I don;t think we need to count the half spaces. with half space count is 36.
without half space - count: 28.
User avatar
EgmatQuantExpert
User avatar
e-GMAT Representative
Joined: 04 Jan 2015
Last visit: 02 Apr 2024
Posts: 3,651
Own Kudos:
20,996
 [2]
Given Kudos: 165
Expert
Expert reply
Posts: 3,651
Kudos: 20,996
 [2]
There are 8 teams in a certain league and each team plays each of the 20 May 2015, 03:10
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
onedayill
pranav123
These type of problems can be solved with a simple diagram.

1. Draw a table consisting of 8 columns and 8 rows.
2. Divide the table by a diagonal and count the number of spaces including the half spaces only on one side of the diagonal.
3. The number should be 28.


I tried uploading the diagram but unsuccessful.

Hi,

I don;t think we need to count the half spaces. with half space count is 36.
without half space - count: 28.
Show more

Dear onedayill

You're right! :)

The boxes along the diagonal (these are the boxes that contribute to half spaces) represent a team playing with itself. Since that is not possible, these boxes should not be included in the counting.

I noticed in the thread above that a few students had doubts about the expression 8C2. If any of the current students too have such a doubt, here's how this question could be solved visually:



There are 7 ways in which Team 1 can play with another team.
Similarly, there are 7 ways for each of the 8 teams to choose its playing opponent.

But it's easy to see that the red zone is essentially a duplication of the blue zone. For example, (Team 1 playing with Team 2) is the same case as (Team 2 playing with Team 1)

So, the correct answer will be: 8(that is, the number of teams)*7(that is, the number of ways in which each team can choose its playing opponent)/2 = 28

Hope this was useful!

Best Regards

Japinder
User avatar
mcelroytutoring
User avatar
Joined: 10 Jul 2015
Last visit: 28 Apr 2026
Posts: 1,207
Own Kudos:
2,680
 [2]
Given Kudos: 282
Status:Expert GMAT, GRE, and LSAT Tutor / Coach
Affiliations: Harvard University, A.B. with honors in Government, 2002
Location: United States (CO)
Age: 45 (10 years and counting on GMAT Club!)
GMAT 1: 770 Q47 V48
GMAT 2: 730 Q44 V47
GMAT 3: 750 Q50 V42
GMAT 4: 730 Q48 V42 (Online)
GRE 1: Q168 V169
GRE 2: Q170 V170
Expert
Expert reply
GMAT 4: 730 Q48 V42 (Online)
GRE 1: Q168 V169
GRE 2: Q170 V170
Posts: 1,207
Kudos: 2,680
 [2]
There are 8 teams in a certain league and each team plays each of the 25 May 2016, 22:25
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Attached is a visual that should help.
Attachments

Screen Shot 2016-05-25 at 9.41.57 PM.png
Screen Shot 2016-05-25 at 9.41.57 PM.png [ 75.15 KiB | Viewed 296521 times ]

User avatar
ScottTargetTestPrep
User avatar
Target Test Prep Representative
Joined: 14 Oct 2015
Last visit: 15 May 2026
Posts: 22,344
Own Kudos:
26,592
 [2]
Given Kudos: 302
Status:Founder & CEO
Affiliations: Target Test Prep
Location: United States (CA)
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 22,344
Kudos: 26,592
 [2]
There are 8 teams in a certain league and each team plays each of the 16 Jun 2016, 06:00
1
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
sarb
There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

A. 15
B. 16
C. 28
D. 56
E. 64
Show more


We are given that there are 8 teams in a league and that each game is played by 2 teams. Note that each team does not play itself, and the order of pairing each team with its opponent doesn't matter. [For example, the pairing of (Team A vs. Team B) is identical to the pairing of (Team B vs. Team A).] The situation can therefore be solved by finding the number of combinations of 8 items taken 2 at a time, or 8C2, as follows:

8C2 = 8! / [2! x (8-2)!]

(8 x 7 x 6!) / (2! x 6!)

(8 x 7)/2!

(8 x 7)/ 2

4 x 7 = 28

Answer C
User avatar
BrentGMATPrepNow
User avatar
Major Poster
Joined: 12 Sep 2015
Last visit: 31 Oct 2025
Posts: 6,733
Own Kudos:
36,577
 [3]
Given Kudos: 799
Location: Canada
Expert
Expert reply
Posts: 6,733
Kudos: 36,577
 [3]
There are 8 teams in a certain league and each team plays each of the Updated on: 06 Dec 2018, 11:46
Originally posted by BrentGMATPrepNow on 27 Jun 2017, 06:43.
Last edited by BrentGMATPrepNow on 06 Dec 2018, 11:46, edited 1 time in total.
3
Kudos
Add Kudos
Bookmarks
Bookmark this Post
sarb
There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

A. 15
B. 16
C. 28
D. 56
E. 64
Show more

There are 8 teams. If we ask each team, "How many teams did you play?" we'll find that each team played 7 teams, which gives us a total of 56 games (since 8 x 7 = 56).

From here we need to recognize that each game has been COUNTED TWICE.
For example, if Team A and Team B play a game, then Team A counts it as a game, and Team B ALSO counts it as a game.

So, to account for the DUPLICATION, we'll divide 56 by 2 to get 28

Answer: C

Cheers,
Brent
User avatar
SVaidyaraman
User avatar
Joined: 17 Dec 2012
Last visit: 11 Jul 2025
Posts: 566
Own Kudos:
1,838
Given Kudos: 20
Location: India
Expert
Expert reply
Posts: 566
Kudos: 1,838
There are 8 teams in a certain league and each team plays each of the 14 Oct 2017, 02:54
Kudos
Add Kudos
Bookmarks
Bookmark this Post
sarb
There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

A. 15
B. 16
C. 28
D. 56
E. 64
Show more
One needs to always find n and r in permutation and combination problems. n is the total number from which you choose and r is how many you choose at a time which makes it one possibility. If the order of the entities chosen at a time, does not matter as in this case, it is nCr , otherwise it is nPr.

n and r in this problem are 8 and 2 respectively and the total number of games played is 8C2=28. Hence C.
User avatar
dave13
User avatar
Joined: 09 Mar 2016
Last visit: 15 Mar 2026
Posts: 1,082
Own Kudos:
1,140
Given Kudos: 3,851
Posts: 1,082
Kudos: 1,140
There are 8 teams in a certain league and each team plays each of the 25 Dec 2017, 14:22
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
sarb
There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

A. 15
B. 16
C. 28
D. 56
E. 64

The total # of games played would be equal to the # of different pairs possible from 8 teams, which is \(C^2_{8}=28\).

Answer: C.

P.S. Please read and follow: https://gmatclub.com/forum/rules-for-pos ... 33935.html Pay attention ot the points #3 and #8.
Show more

Bunuel lets say teams are as follows: A, B, C, D, E, F, G, H. So by using the simple combinatorics formula how do we exclude repeated teams ? I mean if A played with B - this is one game, and it could be also B WITH A ? yeah sounds a bit silly :) but how do we exclude such repetition :? thanks! :)
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 16 May 2026
Posts: 110,451
Own Kudos:
815,205
 [1]
Given Kudos: 106,268
Products:
GMAT Club Tests Forum Quiz
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 110,451
Kudos: 815,205
 [1]
There are 8 teams in a certain league and each team plays each of the 25 Dec 2017, 21:07
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
dave13
Bunuel
sarb
There are 8 teams in a certain league and each team plays each of the other teams exactly once. If each game is played by 2 teams, what is the total number of games played?

A. 15
B. 16
C. 28
D. 56
E. 64

The total # of games played would be equal to the # of different pairs possible from 8 teams, which is \(C^2_{8}=28\).

Answer: C.

P.S. Please read and follow: https://gmatclub.com/forum/rules-for-pos ... 33935.html Pay attention ot the points #3 and #8.

Bunuel lets say teams are as follows: A, B, C, D, E, F, G, H. So by using the simple combinatorics formula how do we exclude repeated teams ? I mean if A played with B - this is one game, and it could be also B WITH A ? yeah sounds a bit silly :) but how do we exclude such repetition :? thanks! :)
Show more

8C2 gives the number of different unordered pairs possible from 8:
(A, B)
(A, C)
...
(B, H)
...
(G, H)

So, (A, B) is there only once (there is no (B, A) there)

Similar questions to practice:
https://gmatclub.com/forum/how-many-diag ... 01540.html
https://gmatclub.com/forum/if-10-persons ... 10622.html
https://gmatclub.com/forum/10-business-e ... 26163.html
https://gmatclub.com/forum/how-many-diff ... 29992.html
https://gmatclub.com/forum/15-chess-play ... 55939.html
https://gmatclub.com/forum/there-are-5-c ... 27235.html
https://gmatclub.com/forum/if-each-parti ... 42222.html
https://gmatclub.com/forum/there-are-8-t ... 34582.html
https://gmatclub.com/forum/there-are-8-t ... 32366.html
https://gmatclub.com/forum/in-a-kickball ... 61846.html
https://gmatclub.com/forum/there-are-8-t ... 34582.html
 1   2   3   
Moderators:
Bunuel
Math Expert
110451 posts
Krunaal
Tuck School Moderator
852 posts