Last visit was: 23 May 2024, 08:50 It is currently 23 May 2024, 08:50
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
SORT BY:
Date
Tags:
Show Tags
Hide Tags
Math Expert
Joined: 02 Sep 2009
Posts: 93419
Own Kudos [?]: 626059 [12]
Given Kudos: 81940
Send PM
Manager
Manager
Joined: 24 Feb 2020
Posts: 119
Own Kudos [?]: 550 [2]
Given Kudos: 118
Location: Italy
WE:Analyst (Investment Banking)
Send PM
Retired Moderator
Joined: 05 May 2016
Posts: 782
Own Kudos [?]: 687 [0]
Given Kudos: 1316
Location: India
Send PM
IESE School Moderator
Joined: 11 Feb 2019
Posts: 271
Own Kudos [?]: 171 [0]
Given Kudos: 53
Send PM
Re: A number is to be written in each of the small squares in the figure [#permalink]
As per qth stem: 9 + x+ y = 4 + y +z
or 5 + x = z
or x = z -5

If we get z, we will get x

Let's analyze the statements:

I: z= 5: As per initial analysis; we can get x SUFFICIENT
II: y = 8; we cannot get z or x using this. NOT SUFFICIENT

Hence A
Director
Director
Joined: 09 Jan 2020
Posts: 961
Own Kudos [?]: 228 [0]
Given Kudos: 434
Location: United States
Send PM
Re: A number is to be written in each of the small squares in the figure [#permalink]
Bunuel wrote:

A number is to be written in each of the small squares in the figure above so that the sum of the numbers in any row is the same as the sum of the number s in any column: What number does x represent?

(1) z represents 5.
(2) y represents 8.


DS20400


Attachment:
1.png


(1) z represents 5.

\(4 + y + 5 = 9 + x + y\)

\(9 + y = 9 + x + y\)

\(0 = x\)

SUFFICIENT.

(2) y represents 8.

\(4 + y + z = 9 + x + y\)

\(4 + 8 + z = 9 + x + 8\)

\(12 + z = 17 + x\)

We have two variables remaining; INSUFFICIENT.

Answer is A.
VP
VP
Joined: 11 Aug 2020
Posts: 1258
Own Kudos [?]: 203 [0]
Given Kudos: 332
Send PM
Re: A number is to be written in each of the small squares in the figure [#permalink]
Why is B not sufficient? I used a plug and play approach.

The square would look like this:

5 9 3
8 0 9
4 8 5

Each row and column adds up to 17. x = 0.
Manager
Manager
Joined: 16 Jul 2018
Posts: 213
Own Kudos [?]: 68 [0]
Given Kudos: 261
Send PM
Re: A number is to be written in each of the small squares in the figure [#permalink]
CEdward wrote:
Why is B not sufficient? I used a plug and play approach.

The square would look like this:

5 9 3
8 0 9
4 8 5

Each row and column adds up to 17. x = 0.


Hello CEdward,

The reason why B is not sufficient is because more than one value of x can satisfy the condition, just try to put x=1 and z=6 you will see that it satisfies the condition.
Intern
Intern
Joined: 05 Jul 2021
Posts: 7
Own Kudos [?]: 1 [1]
Given Kudos: 5
Location: Lithuania
Send PM
A number is to be written in each of the small squares in the figure [#permalink]
1
Kudos
Is it just me who was thrown off by the official GMAT question asking "sum of the number s in any column"? For 30 seconds I was trying to figure out, what do they mean by "number S"...
User avatar
Non-Human User
Joined: 09 Sep 2013
Posts: 33150
Own Kudos [?]: 829 [0]
Given Kudos: 0
Send PM
Re: A number is to be written in each of the small squares in the figure [#permalink]
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
GMAT Club Bot
Re: A number is to be written in each of the small squares in the figure [#permalink]
Moderator:
Math Expert
93419 posts