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# Each of the letters in the table above represents one of the

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Each of the letters in the table above represents one of the [#permalink]

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07 Dec 2012, 10:08
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Question Stats:

62% (02:38) correct 38% (01:34) wrong based on 1326 sessions

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Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column. What is the value of r?

(1) v + z = 6
(2) s + t + u + x = 6

[Reveal] Spoiler:
Attachment:

Table.png [ 6.87 KiB | Viewed 14797 times ]
[Reveal] Spoiler: OA
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Each of the letters in the table above represents one of the [#permalink]

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07 Dec 2012, 10:21
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Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column. What is the value of r?

(1) v + z = 6.

Since v and z are 1, 2, or 3, then v=z=3. So, we have 3 in the second and third columns, which mean that neither s nor t can be 3, which means that r must be 3. Sufficient.

(2) s + t + u + x = 6.

We can have two combinations of the numbers to satisfy s + t + u + x = 6:

1+1+1+3=6 OR 1+1+2+2=6. The first case is not possible since in this case three letters out of s, t, u and x would be 1, which would mean that either in the first row or in the first column we have the same number 1.

So, we have 1+1+2+2=6 case, which means that r must be 3 (since no other number in the first column or the first row is 3). Sufficient.

[Reveal] Spoiler:
Attachment:

Table2.png [ 7.02 KiB | Viewed 14375 times ]
Attachment:

Table1.png [ 6.91 KiB | Viewed 14373 times ]

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Re: Each of the letters in the table above represents one of the [#permalink]

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11 Jan 2013, 21:05
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For the seconds statement, I thought of it like this

r + u + x = 6
r + s + t = 6

2r + u + x + s + t = 12
2r+6=12 (Since, s+t+u+x=6)
2r=6
r=3
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Re: Each of the letters in the table above represents one of the [#permalink]

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18 Jun 2013, 01:40
Bumping for review and further discussion*. Get a kudos point for an alternative solution!

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Re: Each of the letters in the table above represents one of the [#permalink]

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18 Jun 2013, 02:34
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Attachment:
Table.png
Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column. What is the value of r?

(1) v + z = 6
(2) s + t + u + x = 6

For St 1, we are given that v+z=6...since possible nos are only 1,2 and 3, we can conclude that v=z=3. Since v and z are in row 2 and row 3 then number 3 in row 1 has to be at position of r -----> r= 3.
Cancelling option B, C and E

From st 2, we have s+t+u+x= 6 and 2r+s+u+t+x= 12....solving for r we get r--->3

Hence ans should be D
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Re: Each of the letters in the table above represents one of the [#permalink]

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09 Aug 2014, 17:19
Hello from the GMAT Club BumpBot!

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Re: Each of the letters in the table above represents one of the [#permalink]

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26 Oct 2015, 08:06
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).

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Re: Each of the letters in the table above represents one of the [#permalink]

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17 Dec 2015, 07:55
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Re: Each of the letters in the table above represents one of the [#permalink]

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05 Aug 2016, 10:43
Top Contributor

Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column. What is the value of r?

(1) v + z = 6
(2) s + t + u + x = 6

[Reveal] Spoiler:
Attachment:
Table.png

Target question: What is the value of r?

Statement 1: v+z = 6
Step 1: If v+z=6, then v and z must both equal 3.
Step 2: If each number occurs exactly once in each row and exactly once in each column, then s cannot equal 3 (since s and v are in the same column) and t cannot equal 3 (since t and z are in the same column).
Step 3: If s and t cannot equal 3, then r must equal 3 (since each number occurs exactly once in each row)
Since we can answer the target question with certainty, statement 1 is SUFFICIENT

Statement 2 s+t+u+x = 6:
If each number occurs exactly once in each row and exactly once in each column, the sum of numbers in any row or column will always equal 6.
So, r+s+t=6, and r+u+x=6
When we combine these two equations, we get
(r+s+t)+ (r+u+x)= 6+6
Simplify to get: 2r+(s+t+u+x)=12
Statement 2 tells us that s+t+u+x=6
When we add this to the equation 2r+(s+t+u+x)=12, we get: 2r+(6)=12
When we solve this, we get r=3
Since we can answer the target question with certainty, statement 2 is SUFFICIENT

[Reveal] Spoiler:
D

Cheers,
Brent
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Re: Each of the letters in the table above represents one of the [#permalink]

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10 Sep 2016, 07:35

Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column. What is the value of r?

(1) v + z = 6
(2) s + t + u + x = 6

[Reveal] Spoiler:
Attachment:
Table.png

1. v+z = 6, which is possible only for 3+3 since there is one 3, in middle and last colomn, the only possible value for r is 3....sufficient
2. s + t + u + x = 6....this is possible for combinations, 1+2 + 1+2 or 2+1 + 1+2 and so on....as each number should occur only once, r has to take value of 3...sufficient

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Re: Each of the letters in the table above represents one of the [#permalink]

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15 Apr 2017, 02:11
m0h1t wrote:
For the seconds statement, I thought of it like this

r + u + x = 6
r + s + t = 6

2r + u + x + s + t = 12
2r+6=12 (Since, s+t+u+x=6)
2r=6
r=3

I guess another good way to think about these problems is in terms of max., min., and extreme values.

i.e. min. value of s+t = 3 and min. value of u+x = also 3 --> and the only way to get 3 from s+t or 3 from u+x is by adding 2+1

therefore r must be 3
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Re: Each of the letters in the table above represents one of the   [#permalink] 15 Apr 2017, 02:11
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