It is currently 20 Nov 2017, 12:33

### 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

# In a certain marching band formation

Author Message
TAGS:

### Hide Tags

Joined: 19 Jul 2012
Posts: 169

Kudos [?]: 269 [0], given: 31

Location: India
GMAT 1: 630 Q49 V28
GPA: 3.3
In a certain marching band formation [#permalink]

### Show Tags

29 Jun 2013, 03:35
00:00

Difficulty:

85% (hard)

Question Stats:

51% (01:15) correct 49% (01:40) wrong based on 99 sessions

### HideShow timer Statistics

In a certain marching band formation, each row of band members has the same number of members, and the number of rows is 1 less than the number of members in a row. How many band members are there in each row?

(1) There is a total of 90 band members.
(2) If each of the members of the last row were assigned to a different row, the row with the least number of members would have 10 members.
[Reveal] Spoiler: OA

Kudos [?]: 269 [0], given: 31

Manager
Joined: 09 Jul 2012
Posts: 57

Kudos [?]: 15 [0], given: 29

Re: In a certain marching band formation [#permalink]

### Show Tags

30 Jun 2013, 12:05
It is basically a formation that has 1 row less than the number of members ---> number of rows + 1 = number of members in a row

1) There are 90 members overall - x * (x + 1) = 90 - simply plug in numbers 9 and 10 and voila it is sufficient since there are no alternate solutions. We now know the exact number of rows and members in a row. Alternatively, you could simply use the formula x^2 + x - 90 = 0 and find the solution there. Sufficient

2) A little tricky wording because it almost seems that there could be only one row with the least number of members (in this case 10). But depending on the number of members there could be more rows with 10 members while other rows have more than 10 (i.e. 11). Not sufficient

Kudos [?]: 15 [0], given: 29

Senior Manager
Joined: 27 May 2012
Posts: 420

Kudos [?]: 88 [0], given: 485

Re: In a certain marching band formation [#permalink]

### Show Tags

20 Aug 2013, 21:56
Baracuda123 wrote:
It is basically a formation that has 1 row less than the number of members ---> number of rows + 1 = number of members in a row

1) There are 90 members overall - x * (x + 1) = 90 - simply plug in numbers 9 and 10 and voila it is sufficient since there are no alternate solutions. We now know the exact number of rows and members in a row. Alternatively, you could simply use the formula x^2 + x - 90 = 0 and find the solution there. Sufficient

2) A little tricky wording because it almost seems that there could be only one row with the least number of members (in this case 10). But depending on the number of members there could be more rows with 10 members while other rows have more than 10 (i.e. 11). Not sufficient

To me it seems something is wrong with statement 2 , if all rows are supposed to have the same number of members how can there be a least row and most row? Something seems odd about statement 2
_________________

- Stne

Kudos [?]: 88 [0], given: 485

Manager
Joined: 06 Jun 2012
Posts: 140

Kudos [?]: 274 [0], given: 37

Re: In a certain marching band formation [#permalink]

### Show Tags

21 Aug 2013, 02:28
I thought the answer was D. Because i took the last row members and distributed den equally to each row. Which makes the no. of rows (n-2) and row with the least no. will now have (n+1) and two rows will have (n+2)
But they never said they were equally divided. Alas
_________________

Please give Kudos if you like the post

Kudos [?]: 274 [0], given: 37

Manager
Status: Build your own dreams,Otherwise some one else will hire you to build there's.
Joined: 30 Apr 2015
Posts: 96

Kudos [?]: 27 [0], given: 30

Location: India
Concentration: Finance
Schools: BYU-Marriott'18
GMAT 1: 590 Q45 V26
GMAT 2: 660 Q47 V34
GPA: 3.68
Re: In a certain marching band formation [#permalink]

### Show Tags

03 Mar 2016, 09:33
there is something wrong with statement 2...
As.suppose there are 8 rows and each has 9 members
if we distribute the last row then every other row will have 10 members with 1 member still left....
I think statement is not correct.
if we distribute trhe last remaning member then all rows will have 10 members(least in this case) except one,which will have 11 members.
_________________

-Dori Roberts

Kudos [?]: 27 [0], given: 30

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 7738

Kudos [?]: 17817 [1], given: 235

Location: Pune, India
Re: In a certain marching band formation [#permalink]

### Show Tags

03 Mar 2016, 22:40
1
KUDOS
Expert's post
Vineetk wrote:
In a certain marching band formation, each row of band members has the same number of members, and the number of rows is 1 less than the number of members in a row. How many band members are there in each row?

(1) There is a total of 90 band members.
(2) If each of the members of the last row were assigned to a different row, the row with the least number of members would have 10 members.

Yes, the question is incorrect.
Stmnt 1 tells you that there are 9 rows and 10 members in each row.
Stmnt 2 contradicts the information given in the question stem - number of rows is one less than number of members in each row. If this is true, you cannot distribute more members in fewer rows such that each member is assigned to a different row.

Ignore the question.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for \$199

Veritas Prep Reviews

Kudos [?]: 17817 [1], given: 235

Math Expert
Joined: 02 Sep 2009
Posts: 42269

Kudos [?]: 132810 [0], given: 12378

Re: In a certain marching band formation [#permalink]

### Show Tags

07 Mar 2016, 10:00
VeritasPrepKarishma wrote:
Vineetk wrote:
In a certain marching band formation, each row of band members has the same number of members, and the number of rows is 1 less than the number of members in a row. How many band members are there in each row?

(1) There is a total of 90 band members.
(2) If each of the members of the last row were assigned to a different row, the row with the least number of members would have 10 members.

Yes, the question is incorrect.
Stmnt 1 tells you that there are 9 rows and 10 members in each row.
Stmnt 2 contradicts the information given in the question stem - number of rows is one less than number of members in each row. If this is true, you cannot distribute more members in fewer rows such that each member is assigned to a different row.

Ignore the question.

________________
Topic locked.
_________________

Kudos [?]: 132810 [0], given: 12378

Re: In a certain marching band formation   [#permalink] 07 Mar 2016, 10:00
Display posts from previous: Sort by