Last visit was: 17 Jun 2024, 06:52 It is currently 17 Jun 2024, 06:52

Close

GRE Prep 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 GRE 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
Verbal Expert
Joined: 18 Apr 2015
Posts: 28944
Own Kudos [?]: 33719 [1]
Given Kudos: 25364
Send PM
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 11807 [3]
Given Kudos: 136
Send PM
avatar
Intern
Intern
Joined: 08 Mar 2018
Posts: 11
Own Kudos [?]: 13 [1]
Given Kudos: 0
Send PM
avatar
Intern
Intern
Joined: 08 Mar 2018
Posts: 11
Own Kudos [?]: 13 [0]
Given Kudos: 0
Send PM
Re: 5(r + t) [#permalink]
2
Should the answer be A?
5(r+t) 5r+t
5r+5t 5r +t
5t t (subtract 5r)
5 1 (divide by t)
5>1
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 11807 [1]
Given Kudos: 136
Send PM
Re: 5(r + t) [#permalink]
1
kkaur423 wrote:
I believe the question is copied wrong. Quantity B should be 5r + t not 5r+5


You're absolutely right.
I have edited my response accordingly.

Cheers,
Brent
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 11807 [0]
Given Kudos: 136
Send PM
Re: 5(r + t) [#permalink]
2
kkaur423 wrote:
Should the answer be A?
5(r+t) 5r+t
5r+5t 5r +t
5t t (subtract 5r)
5 1 (divide by t)
5>1


There's a slight error in your solution.
When using matching operations, we must be sure to avoid multiplying or dividing a quantity by a negative number.
In your solution, you divided both quantities by t. However, since we don't know whether t is positive or negative, we must avoid dividing the quantities by t.

Let's take it from where you got to:
Quantity A: 5t
Quantity B: t

Notice that, if t = 0, then the two quantities are equal.
If t = 1, then Quantity A is greater
If t = -1, then Quantity B is greater
So, the correct answer must be D.

Cheers,
Brent
avatar
Intern
Intern
Joined: 15 May 2018
Posts: 38
Own Kudos [?]: 11 [0]
Given Kudos: 0
Send PM
Re: 5(r + t) [#permalink]
Carcass wrote:

This question is part of GREPrepClub - The Questions Vault Project



Quantity A
Quantity B
5(r + t)
5r + t


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

My Answer is D
User avatar
Intern
Intern
Joined: 04 May 2017
Posts: 36
Own Kudos [?]: 36 [0]
Given Kudos: 0
Send PM
Re: 5(r + t) [#permalink]
Observe that 5r is the same, but we don't know the sign of t -> D
Intern
Intern
Joined: 09 Jul 2018
Posts: 49
Own Kudos [?]: 77 [0]
Given Kudos: 0
Send PM
Re: 5(r + t) [#permalink]
1
Carcass wrote:
Quantity A
Quantity B
5(r + t)
5r + t


Case 1: t=0
In this case, quantity A \(= 5(r+0) = 5r\) and quantity B \(= 5r+0 = 5r\), so the two quantities are equal.
Eliminate A and B.

Case 2: t=1
In this case, quantity A \(= 5(r+1) = 5r + 5\) and quantity B \(= 5r + 1\), so the two quantities are NOT equal.
Eliminate C.

Show: ::
D
avatar
Manager
Manager
Joined: 19 Mar 2018
Posts: 64
Own Kudos [?]: 37 [0]
Given Kudos: 0
Send PM
Re: 5(r + t) [#permalink]
A B
5r + 5t 5r + t
5r removed from both sides
5t> t so A

However I have a question --> what if T is ZERO?
then 0 = 0 and answer would be D
Verbal Expert
Joined: 18 Apr 2015
Posts: 28944
Own Kudos [?]: 33719 [0]
Given Kudos: 25364
Send PM
Re: 5(r + t) [#permalink]
Expert Reply
See the explanation atop your question provided by GMATGuruNY.

If t=0 the answer is C.

If t=1 the two quantities are different.

So two conflict answers.

D is the right answer, therefore.

See for a proper strategy https://gre.myprepclub.com/forum/quantitat ... 10440.html

Regards
avatar
Intern
Intern
Joined: 27 Nov 2014
Posts: 30
Own Kudos [?]: 8 [0]
Given Kudos: 0
Send PM
Re: 5(r + t) [#permalink]
I picked D
User avatar
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 4603
Own Kudos [?]: 69 [0]
Given Kudos: 0
Send PM
Re: 5(r + t) [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep 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.
Prep Club for GRE Bot
[#permalink]
Moderators:
Moderator
1088 posts
GRE Instructor
218 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne