It is currently 18 Oct 2017, 17:42

### 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

# If x,y,z are positive and y%of x is greater than 100,is x%of

Author Message
Director
Joined: 25 Oct 2008
Posts: 593

Kudos [?]: 1134 [0], given: 100

Location: Kolkata,India
If x,y,z are positive and y%of x is greater than 100,is x%of [#permalink]

### Show Tags

18 Jul 2009, 03:51
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If x,y,z are positive and y%of x is greater than 100,is x%of z less than 10?
1. z% of y is 10
2. z is less than 10% of y

[Reveal] Spoiler:
Ans:C

_________________

http://gmatclub.com/forum/countdown-beginshas-ended-85483-40.html#p649902

Kudos [?]: 1134 [0], given: 100

Manager
Joined: 07 Apr 2009
Posts: 145

Kudos [?]: 13 [0], given: 3

### Show Tags

18 Jul 2009, 07:35
I could solve it by 'B' alone..

given $$xy/100 > 100$$ to be proved is xz < 1000 ?

let us take the stmt 2

z < 10y/100
10z < y
i.e y > 10z

let us say y=10z
put this in the given stmt

10*x*z > 10000
xz > 1000

since y > 10z , it still holds good.

Kudos [?]: 13 [0], given: 3

Manager
Joined: 15 Apr 2008
Posts: 50

Kudos [?]: 23 [0], given: 8

Location: Moscow

### Show Tags

18 Jul 2009, 10:43
tejal777 wrote:
If x,y,z are positive and y%of x is greater than 100,is x%of z less than 10?
1. z% of y is 10
2. z is less than 10% of y

1. z% of y is 10 - insuff, doesn't tell us anything about x
2. z is less than 10% of y - insuff, doesn't tell us anything about x
Combining 1 and 2: let's find a "break point", when "z% of y is 10" and "z is 10% of y": z=10 and y=100. It means, that if we combine 1 and 2, we have: z<10, y>100 (you can plug in numbers to check).
But still, we don't know anything about x, even from "y% of x greater than 100": x can be any number (as y can be endlessly big).
For example: x=100, y=200, z=5 and x=300, y=200, z=5 satisfy both statements, but give different answers.
Hence, E.

Kudos [?]: 23 [0], given: 8

Director
Joined: 01 Apr 2008
Posts: 875

Kudos [?]: 843 [0], given: 18

Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014

### Show Tags

18 Jul 2009, 11:06
tejal , do you have the OE?

Kudos [?]: 843 [0], given: 18

Re: x,y,z are positive   [#permalink] 18 Jul 2009, 11:06
Display posts from previous: Sort by