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

 It is currently 22 Jan 2019, 21:37

### 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 January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
• ### The winners of the GMAT game show

January 22, 2019

January 22, 2019

10:00 PM PST

11:00 PM PST

In case you didn’t notice, we recently held the 1st ever GMAT game show and it was awesome! See who won a full GMAT course, and register to the next one.
• ### Key Strategies to Master GMAT SC

January 26, 2019

January 26, 2019

07:00 AM PST

09:00 AM PST

Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.

# If (x - 1)(x - 2) = 0, x = ?

Author Message
TAGS:

### Hide Tags

Intern
Joined: 19 Jan 2017
Posts: 28
If (x - 1)(x - 2) = 0, x = ?  [#permalink]

### Show Tags

12 Feb 2017, 23:43
00:00

Difficulty:

25% (medium)

Question Stats:

88% (00:28) correct 13% (00:34) wrong based on 19 sessions

### HideShow timer Statistics

If (x - 1)(x - 2) = 0, x = ?

(1) x is even
(2) x is odd

I have started preparing for GMAT recently and well I have got lots of questions that may seem(or is) stupid. I was studying DS with math revolution free trial and as they say that there has to be only one answer that is unique. And they had this example:
and there answer was D (each statement alone is sufficient). Shouldnt it be E cause we still dont know the value of x?
Attachment:

.png [ 277.28 KiB | Viewed 728 times ]
Retired Moderator
Joined: 18 Sep 2014
Posts: 1112
Location: India
Re: If (x - 1)(x - 2) = 0, x = ?  [#permalink]

### Show Tags

13 Feb 2017, 00:51
1
Top Contributor
kuralaysn wrote:
If $$(x-1)(x-2)=0$$,$$x=?$$
1) $$x$$ is even
2) $$x$$ is odd

I have started preparing for GMAT recently and well I have got lots of questions that may seem(or is) stupid.

I was studying DS with math revolution free trial and as they say that there has to be only one answer that is unique..................yes that is perfectly correct.

and there answer was D (each statement alone is sufficient). Shouldnt it be E cause we still dont know the value of x?..........NO

If you observe the solution in the pic you have uploaded , you can see that X can be either 1 or 2. So at this stage we can decide its value.

But while solving for options, we have to solve each option individually without considering other option.
For example, while you are evaluating statement 1, you have to consider x is even but nothing else. So you get value of x as 2. that's it.

And then you move on to statement 2, forgetting all the information of statement 1 and only consider that x is odd and is 1.

the information given in main question is common to all the statements.(1&2)

i hope this helps.
You will get accustomed with the DS as you practice more.
Current Student
Joined: 27 May 2014
Posts: 524
GMAT 1: 730 Q49 V41
Re: If (x - 1)(x - 2) = 0, x = ?  [#permalink]

### Show Tags

13 Feb 2017, 00:59
1
Given, (x-2)(x-1) = 0;
for the above equation to be true, either:
(x-2) = 0
=>x = 2
or:
(x-1) = 0
=>x = 1

Now,
(1) x is even;
So, we can clearly say x = 2 from the above roots; Hence Sufficient.

Again,
(2) x is odd;
So, we can clearly say x = 1 from the above roots; Hence Sufficient.

Cheers.
_________________
Math Expert
Joined: 02 Sep 2009
Posts: 52392
Re: If (x - 1)(x - 2) = 0, x = ?  [#permalink]

### Show Tags

13 Feb 2017, 01:23
kuralaysn wrote:
If (x - 1)(x - 2) = 0, x = ?

(1) x is even
(2) x is odd

I have started preparing for GMAT recently and well I have got lots of questions that may seem(or is) stupid. I was studying DS with math revolution free trial and as they say that there has to be only one answer that is unique. And they had this example:
and there answer was D (each statement alone is sufficient). Shouldnt it be E cause we still dont know the value of x?
Attachment:
.png

This is a flawed question. On the GMAT, two data sufficiency statements always provide TRUE information and these statements NEVER contradict each other or the stem.

(1) says that x is even, while (2) says that x is odd The statement clearly contradict each other, which cannot happen.

Having said that, technically each statement is sufficient alone - from (1) x = 2 and from (2) x = 1. Again the statement cannot give contradictory answers.

You can ignore this question and move on.
_________________
Re: If (x - 1)(x - 2) = 0, x = ? &nbs [#permalink] 13 Feb 2017, 01:23
Display posts from previous: Sort by