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

 It is currently 24 May 2019, 12:46

### 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

# What is the value of xyz? (1) xy + 1 = 2 (2) yz – 1 = –1

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 55271
What is the value of xyz? (1) xy + 1 = 2 (2) yz – 1 = –1  [#permalink]

### Show Tags

06 Aug 2017, 09:00
00:00

Difficulty:

25% (medium)

Question Stats:

86% (00:47) correct 14% (00:54) wrong based on 42 sessions

### HideShow timer Statistics

What is the value of xyz?

(1) xy + 1 = 2
(2) yz – 1 = –1

_________________
Retired Moderator
Joined: 25 Feb 2013
Posts: 1214
Location: India
GPA: 3.82
Re: What is the value of xyz? (1) xy + 1 = 2 (2) yz – 1 = –1  [#permalink]

### Show Tags

06 Aug 2017, 09:04
Bunuel wrote:
What is the value of xyz?

(1) xy + 1 = 2
(2) yz – 1 = –1

Statement 1: implies that $$xy = 1$$. but provides no value for $$z$$. hence insufficient

Statement 2: implies that $$yz = 0$$. therefore $$xyz = 0$$. Sufficient

Option B
Re: What is the value of xyz? (1) xy + 1 = 2 (2) yz – 1 = –1   [#permalink] 06 Aug 2017, 09:04
Display posts from previous: Sort by