Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 24 Aug 2016, 13:34

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

In the figure above, what is the value of z?

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

Hide Tags

CEO
Joined: 17 Nov 2007
Posts: 3589
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 499

Kudos [?]: 3045 [0], given: 360

In the figure above, what is the value of z? [#permalink]

Show Tags

19 Jul 2016, 08:56
Expert's post
1
This post was
BOOKMARKED
00:00

Difficulty:

5% (low)

Question Stats:

90% (01:58) correct 10% (01:08) wrong based on 69 sessions

HideShow timer Statistics

In the figure above, what is the value of z?

1) x = y = 1
2) w = 2

[Reveal] Spoiler:
Attachment:

OG2017_DS237.png [ 167.88 KiB | Viewed 672 times ]
[Reveal] Spoiler: OA

_________________

HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame

Senior Manager
Joined: 26 Nov 2012
Posts: 322
Followers: 0

Kudos [?]: 34 [0], given: 38

In the figure above, what is the value of z? [#permalink]

Show Tags

19 Jul 2016, 09:14
walker wrote:

In the figure above, what is the value of z?

1) x = y = 1
2) w = 2

[Reveal] Spoiler:
Attachment:
OG2017_DS237.png

Stat 1: X = Y = 1 , from the figure we can understand that all sides are equal and it is square. Z = 1 + A .. we are not sure of A ( A is the bottom line in right angled triangle)...Insufficient.

Stat 2: W = 2... We are not sure the about atleast the other side of the right angled triangle to know the value of A...Insufficient.

Stats 1 + 2 = $$1^2$$ + $$A^2$$ = $$2^2$$ ... we can get the value of A... both sufficient to get the value of Z.

Hence C is correct answer..
Director
Joined: 12 Sep 2015
Posts: 543
Followers: 40

Kudos [?]: 379 [0], given: 12

Re: In the figure above, what is the value of z? [#permalink]

Show Tags

19 Jul 2016, 11:46
Top Contributor
walker wrote:

In the figure above, what is the value of z?

1) x = y = 1
2) w = 2

IMPORTANT: For geometry Data Sufficiency questions, we are typically checking to see whether the statements "lock" a particular angle, length, or shape into having just one possible measurement. This concept is discussed in much greater detail in the video at the bottom of the page.

Target question: What is the value of z?

Statement 1: x = y = 1
This statement locks a few lengths into place. However, if we MENTALLY grab the bottom right vertex, we can pull it right to left, without affecting the fact that x = y = 1.
This means that we can alter the length of bottom side, which means we can alter the value of z
Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT

Statement 2: w = 2
This statement locks the hypotenuse into place. However, if we MENTALLY grab the left-most side (with length x), we can move that side right and left, without affecting the fact that w = 2
This means that we can alter the length of bottom side, which means we can alter the value of z
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT

Statements 1 and 2 combined
Knowing that x = 1 and w = 2 means we can use the Pythagorean Theorem to find the length of the bottom side of the right triangle.
Once we know the length of the bottom side of the right triangle, we can add it to 1 to get the length of bottom side, which means we can definitely determine the value of z
Since we can answer the target question with certainty, the combined statements are SUFFICIENT

[Reveal] Spoiler:
C

Cheers,
Brent

RELATED VIDEOS

_________________

Brent Hanneson – Founder of gmatprepnow.com

Brent also tutors students for the GMAT

Intern
Joined: 20 Oct 2014
Posts: 5
Followers: 0

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

Re: In the figure above, what is the value of z? [#permalink]

Show Tags

23 Aug 2016, 05:10
C

I got mislead by reading 2 as sq.root of 2, and ended up with A ..
(thinking that B is just another way of writing A).

C is good.
Re: In the figure above, what is the value of z?   [#permalink] 23 Aug 2016, 05:10
Similar topics Replies Last post
Similar
Topics:
In the figure above, what is the value of x? 1 17 Aug 2016, 01:52
4 In the figure above, what is the value of b? 3 03 Jan 2016, 11:46
2 In the figure above, what is the value of x? 1 29 Dec 2015, 07:41
20 In the figure above, what is the value of x? 7 25 Mar 2013, 22:57
15 What is the value of z in the triangle above? 7 08 Oct 2012, 02:47
Display posts from previous: Sort by

In the figure above, what is the value of z?

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

 Powered by phpBB © phpBB Group and phpBB SEO 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®.