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#### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here. # n is a positive integer, x = 7n + 2, and y = 6n + 3.  Question banks Downloads My Bookmarks Reviews Important topics
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TAGS: GRE Prep Club Legend  Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
Followers: 105

Kudos [?]: 1783  , given: 397

n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
1
KUDOS
Expert's post 00:00

Question Stats: 67% (00:45) correct 32% (00:51) wrong based on 73 sessions
n is a positive integer, x = 7n + 2, and y = 6n + 3.

 Quantity A Quantity B The units digit of x + y 5

A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.

Practice Questions
Question: 3
Page: 62
[Reveal] Spoiler: OA

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test GRE Prep Club Legend  Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
Followers: 105

Kudos [?]: 1783  , given: 397

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
3
KUDOS
Expert's post
Explanation

In the question, you are given that x = 7n + 2 and y = 6n + 3. Substituting the given expressions for x and y in Quantity A, you get x + y = 13n + 5.

Using trial and error, you can compare Quantity A, the ones digit of 13n + 5, and Quantity B, 5, by plugging in a few values for the positive integer n.

If n = 1, then x + y = 18 and the ones digit is 8, which is greater than 5. So in this case Quantity A is greater than Quantity B.
If n = 2, then x + y = 31 and the ones digit is 1, which is less than 5. So in this case Quantity B is greater than Quantity A.

Since in one case Quantity A is greater than Quantity B, and in the other case Quantity B is greater than Quantity A, you can conclude that the correct answer is Choice D.
_________________

Sandy
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Manager Joined: 23 Jan 2016
Posts: 137
Followers: 3

Kudos [?]: 110 , given: 15

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
x + y = 13n + 5.

if n = 10 then the unit digit will be 5 and if n=1 the unit digit will be 8

So the answer is D Intern Joined: 24 Feb 2018
Posts: 14
Followers: 0

Kudos [?]: 7  , given: 6

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
1
KUDOS
sandy wrote:
n is a positive integer, x = 7n + 2, and y = 6n + 3.

 Quantity A Quantity B The ones of x + y 5

A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.

Practice Questions
Question: 3
Page: 62

Substitute 1 and the statement becomes equal. Substitute 2 then B is greater than A.
Ans - D
booyah! Intern Joined: 04 Jul 2018
Posts: 4
Followers: 1

Kudos [?]: 8  , given: 3

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
1
KUDOS
Why did they just word this "the ones"? I had no idea what exactly it was asking for. Moderator  Joined: 18 Apr 2015
Posts: 5898
Followers: 96

Kudos [?]: 1156  , given: 5481

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
1
KUDOS
Expert's post
I think you are perfectly right. The "ones" has little sense even to me.

The right wording should be "the unit digit"

Regards
_________________
Intern Joined: 08 Dec 2018
Posts: 8
Followers: 0

Kudos [?]: 2 , given: 5

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
improper wording leads to error as well as wastage of time. So, kindly use precise words GRE Instructor Joined: 10 Apr 2015
Posts: 1543
Followers: 56

Kudos [?]: 1468  , given: 8

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
1
KUDOS
Expert's post
I have changed "ones" to "units digit"

Cheers,
Brent
_________________

Brent Hanneson – Creator of greenlighttestprep.com Sign up for our free GRE Question of the Day emails Re: n is a positive integer, x = 7n + 2, and y = 6n + 3.   [#permalink] 10 Mar 2019, 08:24
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