Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 25 May 2017, 14:05

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Are x and y both positive? (1) 2x-2y = 1 (2) x/y > 1

Author Message
TAGS:

### Hide Tags

Manager
Joined: 06 Jan 2008
Posts: 215
Followers: 1

Kudos [?]: 91 [8] , given: 1

Are x and y both positive? (1) 2x-2y = 1 (2) x/y > 1 [#permalink]

### Show Tags

03 May 2008, 09:11
8
KUDOS
59
This post was
BOOKMARKED
00:00

Difficulty:

65% (hard)

Question Stats:

53% (02:03) correct 47% (01:01) wrong based on 1643 sessions

### HideShow timer Statistics

Are x and y both positive?

(1) 2x-2y = 1
(2) x/y > 1
[Reveal] Spoiler: OA

Last edited by Bunuel on 18 Mar 2012, 06:02, edited 2 times in total.
Edited the question and added the OA
Math Expert
Joined: 02 Sep 2009
Posts: 38878
Followers: 7733

Kudos [?]: 106122 [33] , given: 11607

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

19 Jul 2010, 11:32
33
KUDOS
Expert's post
28
This post was
BOOKMARKED
Are x and y both positive?
(1) 2x-2y=1
(2) x/y>1

(1) 2x-2y=1. Well this one is clearly insufficient. You can do it with number plugging OR consider the following: x and y both positive means that point (x,y) is in the I quadrant. 2x-2y=1 --> y=x-1/2, we know it's an equation of a line and basically question asks whether this line (all (x,y) points of this line) is only in I quadrant. It's just not possible. Not sufficient.

(2) x/y>1 --> x and y have the same sign. But we don't know whether they are both positive or both negative. Not sufficient.

(1)+(2) Again it can be done with different approaches. You should just find the one which is the less time-consuming and comfortable for you personally.

One of the approaches:
$$2x-2y=1$$ --> $$x=y+\frac{1}{2}$$
$$\frac{x}{y}>1$$ --> $$\frac{x-y}{y}>0$$ --> substitute x --> $$\frac{1}{y}>0$$ --> $$y$$ is positive, and as $$x=y+\frac{1}{2}$$, $$x$$ is positive too. Sufficient.

Discussed here: ds1-93964.html?hilit=number%20plugging%20consider%20approaches and also here along with other hard inequality problems: inequality-and-absolute-value-questions-from-my-collection-86939.html

Hope it helps.
_________________
Intern
Joined: 16 Jul 2010
Posts: 18
Followers: 1

Kudos [?]: 18 [12] , given: 9

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

20 Jul 2010, 12:41
12
KUDOS
I found this one easiest to solve by drawing a graph. Clearly 1) and 2) alone are not sufficient as discussed, so what remains to be seen is if 2) adds enough information to 1) to determine if both x and y are positive.

Drawing a quick graph of the line y=x-1/2 we find that the x-intercept of the line is (0.5,0) and the y-intercept is (0,-0.5). From this graph we can clearly see that we don't need to worry about anything in the 4th quadrant (+x/-y is not >1) or the 3rd quadrant (|x|<|y|, therefore x/y is not >1). All that is left is the 1st quadrant, in which x and y are both positive.

Sufficient.
_________________

If you find my posts useful, please award me some Kudos!

Manager
Joined: 17 Aug 2010
Posts: 54
Followers: 0

Kudos [?]: 77 [1] , given: 18

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

30 Sep 2010, 00:48
1
KUDOS
Manbehindthecurtain wrote:
Are x and Y both positive?

1) 2X-2Y = 1
2) (x/y) > 1

I guessed and got it right with a 50/50 guess at the end.

What I have done here is this

1) 2x - 2y = 1
hence x - y = \frac{1}{2} {Dividing both side by 2}
In sufficient

2) [fraction]x > y[/fraction] Alone in sufficient

When (1) + (2) We can say that if X is greater than y than x-y will yield a positive result.

Please correct me if I am wrong
_________________

I don't want kudos.. I want to see smile on your face if I am able to help you.. which is priceless.

Math Expert
Joined: 02 Sep 2009
Posts: 38878
Followers: 7733

Kudos [?]: 106122 [1] , given: 11607

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

30 Sep 2010, 01:03
1
KUDOS
Expert's post
4
This post was
BOOKMARKED
zerotoinfinite2006 wrote:
Manbehindthecurtain wrote:
Are x and Y both positive?

1) 2X-2Y = 1
2) (x/y) > 1

I guessed and got it right with a 50/50 guess at the end.

What I have done here is this

1) 2x - 2y = 1
hence x - y = \frac{1}{2} {Dividing both side by 2}
In sufficient

2) x > y Alone in sufficient

When (1) + (2) We can say that if X is greater than y than x-y will yield a positive result.

Please correct me if I am wrong

First of all: the question is "are x and Y both positive?" not whether "x-y will yield a positive result".

Next, the red part is not correct.

$$\frac{x}{y}>1$$ does not mean that $$x>y$$. If both $$x$$ and $$y$$ are positive, then $$x>y$$, BUT if both are negative, then $$x<y$$. What you are actually doing when writing $$x>y$$ from $$\frac{x}{y}>1$$ is multiplying both parts of inequality by $$y$$: never multiply (or reduce) an inequality by variable (or by an expression with variable) if you don't know the sign of it or are not certain that variable (or expression with variable) doesn't equal to zero.

So from (2) $$\frac{x}{y}>1$$, we can only deduce that $$x$$ and $$y$$ have the same sigh (either both positive or both negative).

See the complete solution of this problem in my previous post.

Hope it helps.
_________________
Manager
Joined: 17 Aug 2010
Posts: 54
Followers: 0

Kudos [?]: 77 [1] , given: 18

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

30 Sep 2010, 07:15
1
KUDOS
Bunuel wrote:
zerotoinfinite2006 wrote:
Manbehindthecurtain wrote:
Are x and Y both positive?

1) 2X-2Y = 1
2) (x/y) > 1

I guessed and got it right with a 50/50 guess at the end.

What I have done here is this

1) 2x - 2y = 1
hence x - y = \frac{1}{2} {Dividing both side by 2}
In sufficient

2) x > y Alone in sufficient

When (1) + (2) We can say that if X is greater than y than x-y will yield a positive result.

Please correct me if I am wrong

First of all: the question is "are x and Y both positive?" not whether "x-y will yield a positive result".

Next, the red part is not correct.

$$\frac{x}{y}>1$$ does not mean that $$x>y$$. If both $$x$$ and $$y$$ are positive, then $$x>y$$, BUT if both are negative, then $$x<y$$. What you are actually doing when writing $$x>y$$ from $$\frac{x}{y}>1$$ is multiplying both parts of inequality by $$y$$: never multiply (or reduce) an inequality by variable (or by an expression with variable) if you don't know the sign of it or are not certain that variable (or expression with variable) doesn't equal to zero.

So from (2) $$\frac{x}{y}>1$$, we can only deduce that $$x$$ and $$y$$ have the same sigh (either both positive or both negative).

See the complete solution of this problem in my previous post.

Hope it helps.

I can clearly see how much weak I am in DS . I have no idea how to improve it. I am extremely weak in number system , including these kind of question. And day by day I am getting demoralize that I can't solve these kind of questions.

Anyways, Thanks a lot for your explanation Bunuel. You are genius as always.
+1 more .
_________________

I don't want kudos.. I want to see smile on your face if I am able to help you.. which is priceless.

Math Expert
Joined: 02 Sep 2009
Posts: 38878
Followers: 7733

Kudos [?]: 106122 [1] , given: 11607

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

30 Sep 2010, 07:22
1
KUDOS
Expert's post
zerotoinfinite2006 wrote:
I can clearly see how much weak I am in DS . I have no idea how to improve it. I am extremely weak in number system , including these kind of question. And day by day I am getting demoralize that I can't solve these kind of questions.

Anyways, Thanks a lot for your explanation Bunuel. You are genius as always.
+1 more .

Check Number Theory chapter of Math Book for more on number properties (link in my signature).
_________________
SVP
Joined: 16 Nov 2010
Posts: 1666
Location: United States (IN)
Concentration: Strategy, Technology
Followers: 34

Kudos [?]: 533 [2] , given: 36

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

13 Mar 2011, 19:11
2
KUDOS
1 is not suff, x = 0, y = -1/2

2 is not suff,x and y can be both -ve

Combining both :

x - y = 1/2

and (x - y)/y > 0

so 1/2/y > 0 => y is +ve and because x - y is +ve, x is +ve as well.

_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

GMAT Club Premium Membership - big benefits and savings

Director
Status: No dream is too large, no dreamer is too small
Joined: 14 Jul 2010
Posts: 633
Followers: 44

Kudos [?]: 972 [2] , given: 39

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

06 Apr 2011, 08:47
2
KUDOS
i did same u subhashghosh
(1) 2x-2y=1
x-y= 1/2
so y could be +ve or -ve insuff.

(2) x/y>1
here x and y both could be +ve or -ve. so insuff.

Considering C
from (1) x is positive so from (2) y must be positive.
Ans. C.
_________________

Collections:-
PSof OG solved by GC members: http://gmatclub.com/forum/collection-ps-with-solution-from-gmatclub-110005.html
DS of OG solved by GC members: http://gmatclub.com/forum/collection-ds-with-solution-from-gmatclub-110004.html
100 GMAT PREP Quantitative collection http://gmatclub.com/forum/gmat-prep-problem-collections-114358.html
Collections of work/rate problems with solutions http://gmatclub.com/forum/collections-of-work-rate-problem-with-solutions-118919.html
Mixture problems in a file with best solutions: http://gmatclub.com/forum/mixture-problems-with-best-and-easy-solutions-all-together-124644.html

Senior Manager
Joined: 12 Oct 2011
Posts: 266
Followers: 0

Kudos [?]: 50 [2] , given: 110

Re: Are x and Y both positive? 1) 2X-2Y = 1 2) (x/y) > 1 I [#permalink]

### Show Tags

04 Jan 2012, 00:28
2
KUDOS
Question: Is x > 0 AND y > 0?

Statement 1: 2x - 2y = 1 => 2(x - y) = 1 => x - y = 1/2
This just tells us that the difference is positive. But this can be true for cases when both x and y are positive, and when both x and y are negative.
For instance, x = 1.5, y = 1 => x - y = 0.5; also, x = -1, y = -1.5 => x - y = 0.5. Thus, INSUFFICIENT.

Statement 2: x/y > 1
This just tells us that x and y have the same sign. That is, both are positive or both are negative. INSUFFICIENT.

Combining these statements, we can use the same numbers used in Statement 1 to find out that both the cases together do not work for negative numbers.
For instance, x = -1, y = -1.5 => x - y = 0.5. However, x/y < 1. This violates statement 2.

Thus, the combination of the given statements tells us that x and y both have to be positive. => x > 0 AND y > 0. SUFFICIENT.
_________________

Consider KUDOS if you feel the effort's worth it

Intern
Joined: 16 Feb 2012
Posts: 35
Location: United States
Concentration: Entrepreneurship, Technology
GMAT 1: 690 Q47 V38
GPA: 3.7
Followers: 1

Kudos [?]: 11 [0], given: 2

Re: Are x and y both positive? (1) 2x-2x = 1 (2) x/y > 1 [#permalink]

### Show Tags

17 Mar 2012, 18:54
Well, already proved by so many members in different ways, I will just share mine.

Clearly 1) 2x-2y =1, does not say much except simplifying it to x-y = 1/2 ,
2) x/y>1 , simplifying it to x>y => x-y>0

I start with 2nd , x>y => X, Y positive or x,y negative. x/y +/- (Not an option since x/y>1)
not I pick back 1st, x-y>1/2, if x is -ve, the y > x and +ve, but from 2nd we know that is not true. x>y.

so, we know x is +ve. Now, if x is +ve, then y cannot be -ve because x/y is +ve. So x,y are +ve and hence we need both statements to answer it.
_________________

Keeping up the spirit. Target = 750

Intern
Joined: 15 Feb 2012
Posts: 8
Location: India
Concentration: General Management, Operations
Schools: ISB '14
GPA: 3.09
WE: Operations (Manufacturing)
Followers: 0

Kudos [?]: 7 [0], given: 14

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

18 Mar 2012, 07:31
Bunuel wrote:
zerotoinfinite2006 wrote:
Manbehindthecurtain wrote:
Are x and Y both positive?

1) 2X-2Y = 1
2) (x/y) > 1

I guessed and got it right with a 50/50 guess at the end.

What I have done here is this

1) 2x - 2y = 1
hence x - y = \frac{1}{2} {Dividing both side by 2}
In sufficient

2) x > y Alone in sufficient

When (1) + (2) We can say that if X is greater than y than x-y will yield a positive result.

Please correct me if I am wrong

First of all: the question is "are x and Y both positive?" not whether "x-y will yield a positive result".

Next, the red part is not correct.

$$\frac{x}{y}>1$$ does not mean that $$x>y$$. If both $$x$$ and $$y$$ are positive, then $$x>y$$, BUT if both are negative, then $$x<y$$. What you are actually doing when writing $$x>y$$ from $$\frac{x}{y}>1$$ is multiplying both parts of inequality by $$y$$: never multiply (or reduce) an inequality by variable (or by an expression with variable) if you don't know the sign of it or are not certain that variable (or expression with variable) doesn't equal to zero.

So from (2) $$\frac{x}{y}>1$$, we can only deduce that $$x$$ and $$y$$ have the same sigh (either both positive or both negative).

See the complete solution of this problem in my previous post.

Hope it helps.

we can multiply y to both numerator and denominator of x/y
the advantage is that the denominator becomes a square i.e in this case $$y^2$$
so now we can safely cross multiply in $$xy/y^2>1$$ since square of a no. is always +ve
$$xy>y^2$$ or $$y(x-y)>0$$
This is a general method.
Math Expert
Joined: 02 Sep 2009
Posts: 38878
Followers: 7733

Kudos [?]: 106122 [1] , given: 11607

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

18 Mar 2012, 07:39
1
KUDOS
Expert's post
jach2012 wrote:
we can multiply y to both numerator and denominator of x/y
the advantage is that the denominator becomes a square i.e in this case $$y^2$$
so now we can safely cross multiply in $$xy/y^2>1$$ since square of a no. is always +ve
$$xy>y^2$$ or $$y(x-y)>0$$
This is a general method.

More usual way of doing this would be: $$\frac{x}{y}>1$$ --> $$\frac{x}{y}-1>$$ --> $$\frac{x-y}{y}>0$$.
_________________
Manager
Status: MBA Aspirant
Joined: 12 Jun 2010
Posts: 176
Location: India
WE: Information Technology (Investment Banking)
Followers: 3

Kudos [?]: 89 [0], given: 1

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

09 May 2012, 10:15
Bunuel wrote:
Are x and y both positive?
(1) 2x-2y=1
(2) x/y>1

(1) 2x-2y=1. Well this one is clearly insufficient. You can do it with number plugging OR consider the following: x and y both positive means that point (x,y) is in the I quadrant. 2x-2y=1 --> y=x-1/2, we know it's an equation of a line and basically question asks whether this line (all (x,y) points of this line) is only in I quadrant. It's just not possible. Not sufficient.

(2) x/y>1 --> x and y have the same sign. But we don't know whether they are both positive or both negative. Not sufficient.

(1)+(2) Again it can be done with different approaches. You should just find the one which is the less time-consuming and comfortable for you personally.

One of the approaches:
$$2x-2y=1$$ --> $$x=y+\frac{1}{2}$$
$$\frac{x}{y}>1$$ --> $$\frac{x-y}{y}>0$$ --> substitute x --> $$\frac{1}{y}>0$$ --> $$y$$ is positive, and as $$x=y+\frac{1}{2}$$, $$x$$ is positive too. Sufficient.

Discussed here: ds1-93964.html?hilit=number%20plugging%20consider%20approaches and also here along with other hard inequality problems: inequality-and-absolute-value-questions-from-my-collection-86939.html

Hope it helps.

Bunnel:

I was trying to solve this question by plugging in numbers. I too agree that staements A and B both alone are insufficient.
SO now by taking both the statements together x>y so let us take x=3/2 and y=1 and plugging this value we can satisfy the equation 2x-2y = 1.
Now let us take x=-1 and y=-3/2 and again plugging this value we can satisfy the equation 2x-2y = 1.

So the answer must be E.
Please correct me where I am going wrong.
Math Expert
Joined: 02 Sep 2009
Posts: 38878
Followers: 7733

Kudos [?]: 106122 [1] , given: 11607

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

09 May 2012, 10:22
1
KUDOS
Expert's post
1
This post was
BOOKMARKED
subhajeet wrote:
Bunuel wrote:
Are x and y both positive?
(1) 2x-2y=1
(2) x/y>1

(1) 2x-2y=1. Well this one is clearly insufficient. You can do it with number plugging OR consider the following: x and y both positive means that point (x,y) is in the I quadrant. 2x-2y=1 --> y=x-1/2, we know it's an equation of a line and basically question asks whether this line (all (x,y) points of this line) is only in I quadrant. It's just not possible. Not sufficient.

(2) x/y>1 --> x and y have the same sign. But we don't know whether they are both positive or both negative. Not sufficient.

(1)+(2) Again it can be done with different approaches. You should just find the one which is the less time-consuming and comfortable for you personally.

One of the approaches:
$$2x-2y=1$$ --> $$x=y+\frac{1}{2}$$
$$\frac{x}{y}>1$$ --> $$\frac{x-y}{y}>0$$ --> substitute x --> $$\frac{1}{y}>0$$ --> $$y$$ is positive, and as $$x=y+\frac{1}{2}$$, $$x$$ is positive too. Sufficient.

Discussed here: ds1-93964.html?hilit=number%20plugging%20consider%20approaches and also here along with other hard inequality problems: inequality-and-absolute-value-questions-from-my-collection-86939.html

Hope it helps.

Bunnel:

I was trying to solve this question by plugging in numbers. I too agree that staements A and B both alone are insufficient.
SO now by taking both the statements together x>y so let us take x=3/2 and y=1 and plugging this value we can satisfy the equation 2x-2y = 1.
Now let us take x=-1 and y=-3/2 and again plugging this value we can satisfy the equation 2x-2y = 1.

So the answer must be E.
Please correct me where I am going wrong.

x=-1 and y=-3/2 don't satisfy the second statement: x/y=(-1)/(-3/2)=2/3<1.
_________________
Manager
Status: MBA Aspirant
Joined: 12 Jun 2010
Posts: 176
Location: India
WE: Information Technology (Investment Banking)
Followers: 3

Kudos [?]: 89 [0], given: 1

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

09 May 2012, 10:32
Bunuel wrote:
subhajeet wrote:
Bunuel wrote:
Are x and y both positive?
(1) 2x-2y=1
(2) x/y>1

(1) 2x-2y=1. Well this one is clearly insufficient. You can do it with number plugging OR consider the following: x and y both positive means that point (x,y) is in the I quadrant. 2x-2y=1 --> y=x-1/2, we know it's an equation of a line and basically question asks whether this line (all (x,y) points of this line) is only in I quadrant. It's just not possible. Not sufficient.

(2) x/y>1 --> x and y have the same sign. But we don't know whether they are both positive or both negative. Not sufficient.

(1)+(2) Again it can be done with different approaches. You should just find the one which is the less time-consuming and comfortable for you personally.

One of the approaches:
$$2x-2y=1$$ --> $$x=y+\frac{1}{2}$$
$$\frac{x}{y}>1$$ --> $$\frac{x-y}{y}>0$$ --> substitute x --> $$\frac{1}{y}>0$$ --> $$y$$ is positive, and as $$x=y+\frac{1}{2}$$, $$x$$ is positive too. Sufficient.

Discussed here: ds1-93964.html?hilit=number%20plugging%20consider%20approaches and also here along with other hard inequality problems: inequality-and-absolute-value-questions-from-my-collection-86939.html

Hope it helps.

Bunnel:

I was trying to solve this question by plugging in numbers. I too agree that staements A and B both alone are insufficient.
SO now by taking both the statements together x>y so let us take x=3/2 and y=1 and plugging this value we can satisfy the equation 2x-2y = 1.
Now let us take x=-1 and y=-3/2 and again plugging this value we can satisfy the equation 2x-2y = 1.

So the answer must be E.
Please correct me where I am going wrong.

x=-1 and y=-3/2 don't satisfy the second statement: x/y=(-1)/(-3/2)=2/3<1.

Can we write the expression x/y>1 as x>y. I did it this way and plugged in the values x=-1 and y=-3/2
Math Expert
Joined: 02 Sep 2009
Posts: 38878
Followers: 7733

Kudos [?]: 106122 [0], given: 11607

Re: Are X and Y both positive? GMAT PREP CAT [#permalink]

### Show Tags

09 May 2012, 10:35
subhajeet wrote:
Can we write the expression x/y>1 as x>y. I did it this way and plugged in the values x=-1 and y=-3/2

_________________
VP
Joined: 24 Jul 2011
Posts: 1231
GMAT 1: 780 Q51 V48
GRE 1: 1540 Q800 V740
Followers: 133

Kudos [?]: 587 [4] , given: 19

### Show Tags

12 May 2012, 01:36
4
KUDOS
Statement (1): x-y = 1/2. We can have x=1,y=1/2. Can also have x=0,y=-1/2. Insufficient.
Statement (2): x/y>1. We can have x=3,y=2. Can also have x=-3,y=-2. Insufficient.

Combining both,
(y+1/2)/y > 1
=> 1/2y>0
=> y>0

Also as x/y>1, x must be>0. Sufficient.

C it is.
_________________

GyanOne | Top MBA Rankings and MBA Admissions Blog

Premium MBA Essay Review|Best MBA Interview Preparation|Exclusive GMAT coaching

Get a FREE Detailed MBA Profile Evaluation | Call us now +91 98998 31738

Intern
Joined: 01 Aug 2012
Posts: 1
Followers: 0

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

Re: Are x and y both positive? (1) 2x-2y = 1 (2) x/y > 1 [#permalink]

### Show Tags

02 Aug 2012, 09:10

I used the numbers x = 1, y = 1/2 and x = -1/2 and y = -1 while combining both the statements and both these sets satisfy, hence I get an E. Is this wrong? If so, why?
Math Expert
Joined: 02 Sep 2009
Posts: 38878
Followers: 7733

Kudos [?]: 106122 [0], given: 11607

Re: Are x and y both positive? (1) 2x-2y = 1 (2) x/y > 1 [#permalink]

### Show Tags

02 Aug 2012, 10:04
Expert's post
1
This post was
BOOKMARKED
RohanNanda wrote:

I used the numbers x = 1, y = 1/2 and x = -1/2 and y = -1 while combining both the statements and both these sets satisfy, hence I get an E. Is this wrong? If so, why?

x = -1/2 and y = -1 do not satisfy the second statement: x/y=(-1/2)/(-1)=1/2<1.
_________________
Re: Are x and y both positive? (1) 2x-2y = 1 (2) x/y > 1   [#permalink] 02 Aug 2012, 10:04

Go to page    1   2   3   4   5    Next  [ 85 posts ]

Similar topics Replies Last post
Similar
Topics:
84 Is xy > 0? (1) x - y > -2 (2) x - 2y < -6 29 05 Mar 2017, 08:49
93 Are x and y both positive? (1) 2x - 2y = 1 (2) x/y > 1 56 05 May 2017, 02:14
1 Whether x and y both positive? (1) 2x - 2y =1 (2) x/y > 1 8 23 Aug 2013, 03:05
14 Is xy>0? (1) x-y>-2 (2) x-2y<-6 29 06 Nov 2015, 22:47
13 Is xy > 0? (1) x - y > -2 (2) x - 2y < -6 7 14 Sep 2014, 17:36
Display posts from previous: Sort by