Author 
Message 
TAGS:

Hide Tags

Manager
Joined: 24 Jun 2012
Posts: 122
Location: Pakistan
Concentration: Strategy, International Business
GPA: 3.76

If (x5)(y+2) = 0 which of the following must be true? [#permalink]
Show Tags
31 Jan 2013, 07:41
2
This post was BOOKMARKED
Question Stats:
64% (01:44) correct
36% (00:54) wrong based on 196 sessions
HideShow timer Statistics
If (x5)(y+2) = 0 which of the following must be true? (A) x = y (B) x > y (C) x < y (D) xy = 10 (E) None of the above
Official Answer and Stats are available only to registered users. Register/ Login.
_________________
Push yourself again and again. Don't give an inch until the final buzzer sounds. Larry Bird Success isn't something that just happens  success is learned, success is practiced and then it is shared. Sparky Anderson S
Last edited by Bunuel on 31 Jan 2013, 07:50, edited 1 time in total.
Renamed the topic and edited the question.



Intern
Joined: 12 Feb 2013
Posts: 20

Re: If (x5)(y+2) = 0 which of the following must be true? [#permalink]
Show Tags
04 Jun 2015, 11:35
1
This post received KUDOS
The ques is really good in wording in the sense that it asks "MUST BE TRUE" Had the question been "could be true" then x=5 and y2 could lead to x>y



Math Expert
Joined: 02 Sep 2009
Posts: 39672

Re: Please help me to solve this question [#permalink]
Show Tags
31 Jan 2013, 07:55
sananoor wrote: if (x5)(y+2)=0 which of the following must be true?
(A)X=Y (b) X>Y (C)X<Y (d)XY=10 e.none of th above If (x5)(y+2) = 0 which of the following must be true?(A) x = y (B) x > y (C) x < y (D) xy = 10 (E) None of the above From (x5)(y+2) = 0 it follows that either x=5 or y=2. (A) x = y > not necessarily true. Consider x=5 and y=0. (B) x > y > not necessarily true. Consider x=5 and y=10. (C) x < y > not necessarily true. Consider x=5 and y=0. (D) xy = 10 > not necessarily true. Consider x=5 and y=0. Thus, none of the statements must be true. Answer: E. Hope it's clear. P.S. Please read carefully and follow: rulesforpostingpleasereadthisbeforeposting133935.html Pay attention to the rule #3 (the name of a topic MUST be the first 40 characters (~the first two sentences) of the question).
_________________
New to the Math Forum? Please read this: 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? Extrahard Quant Tests with Brilliant Analytics



Manager
Joined: 24 Jun 2012
Posts: 122
Location: Pakistan
Concentration: Strategy, International Business
GPA: 3.76

Re: If (x5)(y+2) = 0 which of the following must be true? [#permalink]
Show Tags
31 Jan 2013, 09:10
i didnt get this how u consider X and Y values when it is given in the question If (x5)(y+2) this means that X = 5 and Y = 2 thus XY = 10 and X > Y..
_________________
Push yourself again and again. Don't give an inch until the final buzzer sounds. Larry Bird Success isn't something that just happens  success is learned, success is practiced and then it is shared. Sparky Anderson S



Math Expert
Joined: 02 Sep 2009
Posts: 39672

Re: If (x5)(y+2) = 0 which of the following must be true? [#permalink]
Show Tags
31 Jan 2013, 09:20



Current Student
Joined: 02 Jan 2013
Posts: 57
GPA: 3.2
WE: Consulting (Consulting)

Re: If (x5)(y+2) = 0 which of the following must be true? [#permalink]
Show Tags
31 Jan 2013, 17:08
Bunuel wrote: sananoor wrote: i didnt get this how u consider X and Y values when it is given in the question If (x5)(y+2) this means that X = 5 and Y = 2 thus XY = 10 and X > Y.. (x5)(y+2) = 0 means that EITHER x=5 OR y=2. For example, if x=5, then y can be any number. The same way, if y=2, then x can be any number. Bunuel, although your solution is perfect, I would just point out a rewording suggestion on your last comment. (x5)(y+2) =0 means that x = 5 OR y =2 (without the EITHER). Obviously both equalities COULD happen simultaneously, but they don't HAVE TO happen simultaneously in order for the equation in stem to be valid



GMAT Club Legend
Joined: 09 Sep 2013
Posts: 15965

Re: If (x5)(y+2) = 0 which of the following must be true? [#permalink]
Show Tags
31 May 2015, 20:22
Hello from the GMAT Club BumpBot! Thanks to another GMAT 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.
_________________
GMAT Books  GMAT Club Tests  Best Prices on GMAT Courses  GMAT Mobile App  Math Resources  Verbal Resources



Optimus Prep Instructor
Joined: 06 Nov 2014
Posts: 1837

Re: If (x5)(y+2) = 0 which of the following must be true? [#permalink]
Show Tags
02 Jun 2015, 08:01
If (x5)(y+2) = 0 which of the following must be true? (A) x = y Only one of x = y = 5 or x = y =  2, or x can be 100 (or any other value, for example and y= 2, making this equation hold true(B) x > y If x = 5 and y = 2 this is true, but x can be 75 (any value) and y = 2 (C) x < y The same is true for this inequality. If x = 5 y can be any value larger or smaller, or if y = 2 then x can be any value larger or smaller. (D) xy = 10 This is true when x = 5 and y = 2 but they need not be.(E) None of the above
_________________
Janielle Williams
Customer Support




Re: If (x5)(y+2) = 0 which of the following must be true?
[#permalink]
02 Jun 2015, 08:01







