It is currently 11 Dec 2017, 02:40

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

△ is one operation of addition, subtraction, multiplication, or divisi

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

Hide Tags

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4457

Kudos [?]: 3130 [0], given: 0

GPA: 3.82
Premium Member
△ is one operation of addition, subtraction, multiplication, or divisi [#permalink]

Show Tags

New post 31 Aug 2017, 01:24
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

84% (00:36) correct 16% (00:32) wrong based on 43 sessions

HideShow timer Statistics

△ is one operation of addition, subtraction, multiplication, or division. Is 1△3=3△1?

1) 1△1=1
2) 2△3=6
[Reveal] Spoiler: OA

_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 3130 [0], given: 0

Director
Director
User avatar
P
Joined: 04 Dec 2015
Posts: 696

Kudos [?]: 333 [0], given: 261

Location: India
Concentration: Technology, Strategy
Schools: ISB '19, IIMA , IIMB, XLRI
WE: Information Technology (Consulting)
GMAT ToolKit User CAT Tests
△ is one operation of addition, subtraction, multiplication, or divisi [#permalink]

Show Tags

New post 31 Aug 2017, 02:06
MathRevolution wrote:
△ is one operation of addition, subtraction, multiplication, or division. Is 1△3=3△1?

1) 1△1=1
2) 2△3=6

1) \(1△1=1\)

\(1*1 = 1\)

\(\frac{1}{1} = 1\)

Therefore operation \(△\) could be multiplication or division.

\(1△3=3△1\)

\(1*3 = 3*1 = 3\)

\(\frac{1}{3}\) is not equal to \(\frac{3}{1}\)

We are getting two values. Hence I is Not Sufficient.

2) \(2△3=6\)

\(2*3 = 6\)

Only multiplication of \(2\) and \(3\) gives \(6\).

Therefore operation \(△\) is multiplication.

\(1△3=3△1\)

\(1*3 = 3*1 = 3\)

Hence II is Sufficient.

Answer (B)...

_________________
Please Press "+1 Kudos" to appreciate. :-)

Kudos [?]: 333 [0], given: 261

Senior Manager
Senior Manager
User avatar
G
Joined: 02 Jul 2017
Posts: 281

Kudos [?]: 106 [0], given: 66

GMAT 1: 730 Q50 V38
GMAT ToolKit User CAT Tests
Re: △ is one operation of addition, subtraction, multiplication, or divisi [#permalink]

Show Tags

New post 31 Aug 2017, 03:35
△ is one operation of addition, subtraction, multiplication, or division.
We have to find if 1△3=3△1.

This is only true if △ is either + or multiplication ... else for - and division it will be false.

1) 1△1=1
by above equation we can conclude △ is either multiplication or division.
So Not sufficient

2) 2△3=6
Above equation is only possible if △ is multiplication. For all other operations it will not sattis fy the equation.
so △ = multiplication and by this : 1△3=3△1 is True

So Sufficient

Answer: B

Kudos [?]: 106 [0], given: 66

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4457

Kudos [?]: 3130 [0], given: 0

GPA: 3.82
Premium Member
Re: △ is one operation of addition, subtraction, multiplication, or divisi [#permalink]

Show Tags

New post 03 Sep 2017, 18:40
=> 1) 1△1=1
△ could be the multiplication or the division.
If △ is the multiplication, 1△3 = 3△1.
If △ is the division, 1△3 is not equal to 3△1.
This is not sufficient.

1) 2△3=6
△ should be the multiplication only.
Then we have 1△3 = 3△1.
This is sufficient.

Ans: B
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 3130 [0], given: 0

Re: △ is one operation of addition, subtraction, multiplication, or divisi   [#permalink] 03 Sep 2017, 18:40
Display posts from previous: Sort by

△ is one operation of addition, subtraction, multiplication, or divisi

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


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.