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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: Retired Moderator Joined: 07 Jun 2014
Posts: 4803
GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
Followers: 175

Kudos [?]: 3037  , given: 394

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

Question Stats: 78% (00:55) correct 21% (00:49) wrong based on 210 sessions
n is a positive integer, $$x = 7n + 2$$, and $$y = 6n + 3$$.

 Quantity A Quantity B The ones 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 Retired Moderator Joined: 07 Jun 2014
Posts: 4803
GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
Followers: 175

Kudos [?]: 3037  , given: 394

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
4
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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
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test Manager Joined: 23 Jan 2016
Posts: 133
Followers: 4

Kudos [?]: 150  , given: 15

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

if n = 10 then the unit digit will be 5 and if n=1 the unit digit will be 8 Intern Joined: 24 Feb 2018
Posts: 13
Followers: 0

Kudos [?]: 9  , given: 6

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

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
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Why did they just word this "the ones"? I had no idea what exactly it was asking for. Founder  Joined: 18 Apr 2015
Posts: 13918
GRE 1: Q160 V160 Followers: 315

Kudos [?]: 3687  , given: 12942

Re: n is a positive integer, x = 7n + 2, and y = 6n + 3. [#permalink]
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KUDOS
Expert's post
Manager Joined: 08 Dec 2018
Posts: 94
Followers: 0

Kudos [?]: 44 , given: 30

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: 3909
Followers: 164

Kudos [?]: 4777  , given: 70

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  Re: n is a positive integer, x = 7n + 2, and y = 6n + 3.   [#permalink] 10 Mar 2019, 08:24
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