It is currently 13 Dec 2017, 18:40

# Decision(s) Day!:

CHAT Rooms | Ross R1 | Kellogg R1 | Darden R1 | Tepper R1

### 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

# What is the value of |y − 1| ?

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 16 Dec 2011
Posts: 418

Kudos [?]: 240 [2], given: 70

What is the value of |y − 1| ? [#permalink]

### Show Tags

15 Apr 2013, 09:06
2
KUDOS
1
This post was
BOOKMARKED
00:00

Difficulty:

25% (medium)

Question Stats:

63% (00:31) correct 37% (00:32) wrong based on 232 sessions

### HideShow timer Statistics

What is the value of |y − 1| ?

(1) (y − 7)(y + 5) = 0
(2) 2y + 10 = 0
[Reveal] Spoiler: OA

Last edited by Bunuel on 15 Apr 2013, 13:31, edited 1 time in total.

Kudos [?]: 240 [2], given: 70

VP
Status: Far, far away!
Joined: 02 Sep 2012
Posts: 1120

Kudos [?]: 2405 [1], given: 219

Location: Italy
Concentration: Finance, Entrepreneurship
GPA: 3.8
Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

15 Apr 2013, 09:09
1
KUDOS
What is the value of |y − 1| ?

1) (y − 7)(y + 5) = 0
y=7 or y=-5
$$|y - 1|=|7 - 1|=6$$
$$|y - 1|=|- 5 - 1|=6$$
Sufficient

2) 2y + 10 = 0
y=-5
$$|y - 1|=|- 5 - 1|=6$$
Sufficient

IMO D
_________________

It is beyond a doubt that all our knowledge that begins with experience.

Kant , Critique of Pure Reason

Tips and tricks: Inequalities , Mixture | Review: MGMAT workshop
Strategy: SmartGMAT v1.0 | Questions: Verbal challenge SC I-II- CR New SC set out !! , My Quant

Rules for Posting in the Verbal Forum - Rules for Posting in the Quant Forum[/size][/color][/b]

Kudos [?]: 2405 [1], given: 219

Verbal Forum Moderator
Joined: 10 Oct 2012
Posts: 627

Kudos [?]: 1409 [1], given: 136

Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

15 Apr 2013, 10:13
1
KUDOS
doe007 wrote:
What is the value of |y − 1| ?

1) (y − 7)(y + 5) = 0
2) 2y + 10 = 0

Answer will be posted after some discussion.

From F.S 1, we have y=7 or y=-5. In any case, |y-1| = 6, Sufficient.

From F.S 2, we have a unique value for y, Sufficient.

D.
_________________

Kudos [?]: 1409 [1], given: 136

Manager
Status: Looking to improve
Joined: 15 Jan 2013
Posts: 174

Kudos [?]: 75 [1], given: 65

GMAT 1: 530 Q43 V20
GMAT 2: 560 Q42 V25
GMAT 3: 650 Q48 V31
Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

15 Apr 2013, 10:17
1
KUDOS

From Stmt 1, |y - 1| = 6 when y = 7 or -5. - Sufficient

From Stmt 2, |y - 1| = 6 when y = -5 - Sufficient

//kudos please, if the above explanation is good.
_________________

KUDOS is a way to say Thank You

Kudos [?]: 75 [1], given: 65

Intern
Joined: 27 Dec 2012
Posts: 10

Kudos [?]: 22 [0], given: 19

Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

16 Apr 2013, 08:04
What is the value of |y − 1| ?

(1) (y − 7)(y + 5) = 0
(2) 2y + 10 = 0

For DS question, I think that we don't need to find value of y in (1) and (2).

(1). We have one equation with one variable y (exponent of 2), therefore we can find ly-1l => sufficient
(2). We have one equation and one variable y (exponent of 1). Similarly => sufficient.

D

This method is clearly relevant for complex questions.

Kudos [?]: 22 [0], given: 19

Verbal Forum Moderator
Joined: 10 Oct 2012
Posts: 627

Kudos [?]: 1409 [0], given: 136

Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

16 Apr 2013, 08:16
tritringuyen wrote:
What is the value of |y − 1| ?

(1) (y − 7)(y + 5) = 0

We have one equation with one variable y (exponent of 2), therefore we can find ly-1l => sufficient

This question is designed in such a way that both the values of y are giving you the same value for |y-1|. Is not necessary that it will be the case all the time.
_________________

Kudos [?]: 1409 [0], given: 136

Senior Manager
Joined: 16 Dec 2011
Posts: 418

Kudos [?]: 240 [0], given: 70

Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

16 Apr 2013, 08:35
vinaymimani wrote:
tritringuyen wrote:
What is the value of |y − 1| ?

(1) (y − 7)(y + 5) = 0

We have one equation with one variable y (exponent of 2), therefore we can find ly-1l => sufficient

This question is designed in such a way that both the values of y are giving you the same value for |y-1|. Is not necessary that it will be the case all the time.

You are right. There are similar questions where the absolute values for the two expressions are not the same.

Here this question is easy. But the questions set by GMAC often tests simple and basic concepts in a complicated way.

Kudos [?]: 240 [0], given: 70

Senior Manager
Joined: 21 Jan 2010
Posts: 329

Kudos [?]: 230 [0], given: 12

Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

10 May 2013, 16:45
doe007 wrote:
What is the value of |y − 1| ?

(1) (y − 7)(y + 5) = 0
(2) 2y + 10 = 0

Tricky question. Watch out both the values -5 and 7 gives the same value of |y-1|.So A also qualifies. Hence D

Kudos [?]: 230 [0], given: 12

Senior Manager
Joined: 16 Dec 2011
Posts: 418

Kudos [?]: 240 [0], given: 70

Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

10 May 2013, 19:07
Bluelagoon wrote:
doe007 wrote:
What is the value of |y − 1| ?

(1) (y − 7)(y + 5) = 0
(2) 2y + 10 = 0

Tricky question. Watch out both the values -5 and 7 gives the same value of |y-1|.So A also qualifies. Hence D

Your are right. With this type of setup, quadratic equations end up with same absolute value in some questions and different absolute values in some questions. Here the question is in a very simple form and can be solved very quickly (15-20 sec). Real GMAT questions may have more complicated form of the equation which will need more time to solve.

Kudos [?]: 240 [0], given: 70

Manager
Joined: 03 Mar 2013
Posts: 86

Kudos [?]: 10 [0], given: 6

Location: India
Concentration: General Management, Marketing
GPA: 3.49
WE: Web Development (Computer Software)
Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

16 May 2013, 08:16
doe007 wrote:
What is the value of |y − 1| ?

(1) (y − 7)(y + 5) = 0
(2) 2y + 10 = 0

using both we can find out individually,

Trap in stmt1: we get 2 values but when we substuite final answer is same

Kudos [?]: 10 [0], given: 6

Manager
Status: folding sleeves up
Joined: 26 Apr 2013
Posts: 155

Kudos [?]: 143 [0], given: 39

Location: India
Concentration: Finance, Strategy
GMAT 1: 530 Q39 V23
GMAT 2: 560 Q42 V26
GPA: 3.5
WE: Consulting (Computer Hardware)
Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

30 Mar 2014, 12:25
doe007 wrote:
What is the value of |y − 1| ?

(1) (y − 7)(y + 5) = 0
(2) 2y + 10 = 0

oh man! this one tricked me.

I just found the values individually
1> y= 7 or y= -5
2> y= -5

from 1 and 2 we have y =-5.....hence D....

But found that answer is C...have to complete the job before concluding...lesson learnt.

Kudos [?]: 143 [0], given: 39

Director
Joined: 25 Apr 2012
Posts: 721

Kudos [?]: 872 [0], given: 724

Location: India
GPA: 3.21
Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

31 Mar 2014, 22:54
email2vm wrote:
doe007 wrote:
What is the value of |y − 1| ?

(1) (y − 7)(y + 5) = 0
(2) 2y + 10 = 0

oh man! this one tricked me.

I just found the values individually
1> y= 7 or y= -5
2> y= -5

from 1 and 2 we have y =-5.....hence D ....

But found that answer is C...have to complete the job before concluding...lesson learnt.

I think you interchanged the options.

If you combine 2 statements to get the answer then we choose option C
If both statements independently can give us the ans then we choose option D

Ans is D and not C for this Question
_________________

“If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward.”

Kudos [?]: 872 [0], given: 724

Non-Human User
Joined: 09 Sep 2013
Posts: 14870

Kudos [?]: 287 [0], given: 0

Re: What is the value of |y − 1| ? [#permalink]

### Show Tags

18 Jul 2017, 23:36
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.
_________________

Kudos [?]: 287 [0], given: 0

Re: What is the value of |y − 1| ?   [#permalink] 18 Jul 2017, 23:36
Display posts from previous: Sort by