GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

It is currently 03 Aug 2020, 10:24

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

The symbol ∆ denotes one of the four arithmetic operations:addition,su

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Veritas Prep GMAT Instructor
User avatar
V
Joined: 16 Oct 2010
Posts: 10780
Location: Pune, India
Re: The symbol ∆ denotes one of the four arithmetic operations:addition,su  [#permalink]

Show Tags

New post 29 Jul 2019, 20:01
jabhatta@umail.iu.edu wrote:
VeritasKarishma | Bunuel

As a test taker -- how are we supposed to know that ∆ should represent BOTH division AND subtraction

I assumed, the conditions applied individually (subtraction OR division) and thus opted for E

It's clear one or the other works

Since the question says 6∆3=<3
6/3 = 2
OR
6-3 = 3

--------------


∆ will represent one operation only - either division or subtraction. Which one it actually represents, we do not know. So whichever statement MUST BE TRUE should be the one in which ∆ could represent either operation, it would hold.

I. 2∆2 = 0
Is true if ∆ is subtraction but not if it is division.

II. 2∆2 = 1
Is true if ∆ is division but not if it is subtraction.

III. 4∆2 = 2
4 - 2 = 2
4/2 = 2
So this will hold irrespective of whether ∆ is subtraction or division. So this statement will definitely be true.
_________________
Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >
Senior Manager
Senior Manager
avatar
S
Joined: 15 Dec 2016
Posts: 253
Re: The symbol ∆ denotes one of the four arithmetic operations:addition,su  [#permalink]

Show Tags

New post 29 Jul 2019, 20:32
VeritasKarishma wrote:
jabhatta@umail.iu.edu wrote:
VeritasKarishma | Bunuel

As a test taker -- how are we supposed to know that ∆ should represent BOTH division AND subtraction

I assumed, the conditions applied individually (subtraction OR division) and thus opted for E

It's clear one or the other works

Since the question says 6∆3=<3
6/3 = 2
OR
6-3 = 3

--------------


∆ will represent one operation only - either division or subtraction. Which one it actually represents, we do not know. So whichever statement MUST BE TRUE should be the one in which ∆ could represent either operation, it would hold.

I. 2∆2 = 0
Is true if ∆ is subtraction but not if it is division.

II. 2∆2 = 1
Is true if ∆ is division but not if it is subtraction.

III. 4∆2 = 2
4 - 2 = 2
4/2 = 2
So this will hold irrespective of whether ∆ is subtraction or division. So this statement will definitely be true.


Thank you VeritasKarishma for following up!

If I understand correctly it's the MUST BE TRUE that tells the test maker to test both subtraction and division

If the question stem had" may be true".. Do you think E would be accurate in that case ?

Thank you

Posted from my mobile device
Veritas Prep GMAT Instructor
User avatar
V
Joined: 16 Oct 2010
Posts: 10780
Location: Pune, India
Re: The symbol ∆ denotes one of the four arithmetic operations:addition,su  [#permalink]

Show Tags

New post 31 Jul 2019, 04:51
jabhatta@umail.iu.edu wrote:
VeritasKarishma wrote:
jabhatta@umail.iu.edu wrote:
VeritasKarishma | Bunuel

As a test taker -- how are we supposed to know that ∆ should represent BOTH division AND subtraction

I assumed, the conditions applied individually (subtraction OR division) and thus opted for E

It's clear one or the other works

Since the question says 6∆3=<3
6/3 = 2
OR
6-3 = 3

--------------


∆ will represent one operation only - either division or subtraction. Which one it actually represents, we do not know. So whichever statement MUST BE TRUE should be the one in which ∆ could represent either operation, it would hold.

I. 2∆2 = 0
Is true if ∆ is subtraction but not if it is division.

II. 2∆2 = 1
Is true if ∆ is division but not if it is subtraction.

III. 4∆2 = 2
4 - 2 = 2
4/2 = 2
So this will hold irrespective of whether ∆ is subtraction or division. So this statement will definitely be true.


Thank you VeritasKarishma for following up!

If I understand correctly it's the MUST BE TRUE that tells the test maker to test both subtraction and division

If the question stem had" may be true".. Do you think E would be accurate in that case ?

Thank you

Posted from my mobile device


Yes, absolutely correct!
_________________
Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >
CEO
CEO
User avatar
V
Joined: 03 Jun 2019
Posts: 3339
Location: India
GMAT 1: 690 Q50 V34
WE: Engineering (Transportation)
Reviews Badge CAT Tests
Re: The symbol ∆ denotes one of the four arithmetic operations:addition,su  [#permalink]

Show Tags

New post 31 Jul 2019, 04:59
AbdurRakib wrote:
The symbol ∆ denotes one of the four arithmetic operations:addition,subtraction,multiplication,or division,If 6∆3≤ 3 ,which of the following must be true ?

I. 2∆2 = 0
II. 2∆2 = 1
III. 4∆2 = 2

A. I only
B. II only
C. III only
D. I and II only
E. I, II, and III


The symbol ∆ denotes one of the four arithmetic operations:addition,subtraction,multiplication,or division,If 6∆3≤ 3 ,which of the following must be true ?

Since 6∆3≤ 3
6*3 = 18 >3
6+3=9>3
6/3 = 2 <=3
6-3 =3 <=3
Therefore, operator ∆ denotes / or - operations

I. 2∆2 = 0
2/2=1
2-2=0
NOT NECESSARILY TRUE

II. 2∆2 = 1
2/2=1
2-2=0
NOT NECESSARILY TRUE

III. 4∆2 = 2
4/2=2
4-2=2
4∆2 = 2 regardless of the operator / or -
MUST BE TRUE

IMO C
_________________
Kinshook Chaturvedi
Email: kinshook.chaturvedi@gmail.com
Intern
Intern
avatar
B
Joined: 12 May 2020
Posts: 2
Re: The symbol ∆ denotes one of the four arithmetic operations:addition,su  [#permalink]

Show Tags

New post 12 Jun 2020, 09:12
Hi all,

Could any experts help me to confirm with my following calculation is correct or not. I think it will solve most quickly than others.

Given: 6#3<=3 ---> The same: 2x3#3<=3, so only III: 4#2=2 ---> 2x2#2 = 2 <=3: Satisfied. Others is not
Only care about formulas to find the answer soonest, no need to calculate one by one.

Thanks!
Intern
Intern
avatar
B
Joined: 08 Jun 2020
Posts: 1
Re: The symbol ∆ denotes one of the four arithmetic operations:addition,su  [#permalink]

Show Tags

New post 06 Jul 2020, 04:18
1
Hello, I have a query regarding the answer. The question states that the the symbol denoted in the question stem must be any ONE of the four operations and though I too agree that given the example the answer choice should hodl true in subtraction AND division, I dont understand how it could be two operations even though its mentioned it should be any ONE. Thank you.
EMPOWERgmat Instructor
User avatar
V
Status: GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Joined: 19 Dec 2014
Posts: 17264
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Re: The symbol ∆ denotes one of the four arithmetic operations:addition,su  [#permalink]

Show Tags

New post 06 Jul 2020, 16:50
Hi sam12rawat,

When a Quant question asks "which of the following MUST be true?", what it's really asking is "which of the following is ALWAYS true no matter how many different examples we can come up with?"

In the case of this Roman Numeral question, we have to consider whether each of those 3 equations is ALWAYS true or not. Even though the 'symbol' might be subtraction or division (we can never actually define which one), only Roman Numeral 3 is ALWAYS true (whether the symbol is subtraction or division).

GMAT assassins aren't born, they're made,
Rich
_________________
Contact Rich at: Rich.C@empowergmat.com
Image


The Course Used By GMAT Club Moderators To Earn 750+

souvik101990 Score: 760 Q50 V42 ★★★★★
ENGRTOMBA2018 Score: 750 Q49 V44 ★★★★★
GMAT Club Bot
Re: The symbol ∆ denotes one of the four arithmetic operations:addition,su   [#permalink] 06 Jul 2020, 16:50

Go to page   Previous    1   2   [ 27 posts ] 

The symbol ∆ denotes one of the four arithmetic operations:addition,su

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





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