GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 24 Sep 2018, 19:01

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

help me pls... IF X+Y=2 AND X^2+Y^2=2, what is the value of XY?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
B
Joined: 10 Jul 2018
Posts: 6
GMAT ToolKit User
help me pls... IF X+Y=2 AND X^2+Y^2=2, what is the value of XY?  [#permalink]

Show Tags

New post 11 Jul 2018, 14:33
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions

HideShow timer Statistics

IF X+Y=2 AND X^2+Y^2=2, what is the value of XY?


A) -2
B) -1
C) 0
D) 1
E) 2
Intern
Intern
avatar
B
Joined: 21 Jun 2017
Posts: 4
Location: India
GMAT 1: 630 Q48 V30
GRE 1: Q150 V150
GPA: 3.9
Re: help me pls... IF X+Y=2 AND X^2+Y^2=2, what is the value of XY?  [#permalink]

Show Tags

New post 11 Jul 2018, 14:56
(X+Y)^2=(2)^2
(X^2+Y^2)+2XY=4
2+2XY=4
2XY=2
XY=1

Answer is d

Posted from my mobile device
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49430
Re: help me pls... IF X+Y=2 AND X^2+Y^2=2, what is the value of XY?  [#permalink]

Show Tags

New post 11 Jul 2018, 20:21
joaolucas193 wrote:
IF X+Y=2 AND X^2+Y^2=2, what is the value of XY?


A) -2
B) -1
C) 0
D) 1
E) 2


This question is discussed here: https://gmatclub.com/forum/if-x-y-2-and ... 26195.html Hope it helps.

Please read carefully and follow our RULES OF POSTING. Thank you.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

GMAT Club Bot
Re: help me pls... IF X+Y=2 AND X^2+Y^2=2, what is the value of XY? &nbs [#permalink] 11 Jul 2018, 20:21
Display posts from previous: Sort by

help me pls... IF X+Y=2 AND X^2+Y^2=2, what is the value of XY?

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

Events & Promotions

PREV
NEXT


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.