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

It is currently 16 Jan 2019, 00:07

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • The winning strategy for a high GRE score

     January 17, 2019

     January 17, 2019

     08:00 AM PST

     09:00 AM PST

    Learn the winning strategy for a high GRE score — what do people who reach a high score do differently? We're going to share insights, tips and strategies from data we've collected from over 50,000 students who used examPAL.
  • Free GMAT Strategy Webinar

     January 19, 2019

     January 19, 2019

     07:00 AM PST

     09:00 AM PST

    Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

The integers y and z are both positive. Is yz a multiple of 500?

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

Hide Tags

 
Intern
Intern
avatar
Joined: 22 Nov 2014
Posts: 31
Premium Member
The integers y and z are both positive. Is yz a multiple of 500?  [#permalink]

Show Tags

New post 15 Jun 2015, 08:27
1
2
00:00
A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

63% (01:26) correct 37% (04:44) wrong based on 94 sessions

HideShow timer Statistics

The integers y and z are both positive. Is yz a multiple of 500?

(1) yz is a multiple of 25 and z is a multiple of 20.

(2) y^2 is a multiple of 10 and z^2 is a multiple of 5.
CEO
CEO
User avatar
P
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2722
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Reviews Badge
Re: The integers y and z are both positive. Is yz a multiple of 500?  [#permalink]

Show Tags

New post 15 Jun 2015, 09:06
1
Gmatdecoder wrote:
The integers y and z are both positive. Is yz a multiple of 500?

(1) yz is a multiple of 25 and z is a multiple of 20.

(2) y^2 is a multiple of 10 and z^2 is a multiple of 5.


Question : Is yz a multiple of 500?

Statement 1: yz is a multiple of 25 and z is a multiple of 20

Case 1: z= 20 and y= 5 i.e. yz=100 but NOT a multiple of 500

Case 2: z= 100 and y= 5 i.e. yz=500 i.e. a multiple of 500

NOT SUFFICIENT

Statement 2: y^2 is a multiple of 10 and z^2 is a multiple of 5

i.e. y is a multiple of 10 (because y is an Integer and y^2 is a multiple of 10)
AND
z is a multiple of 5 (because z is an Integer and z^2 is a multiple of 5)

i.e. yz is a multiple of 10 and 5 individually
i.e. yz is a multiple of 50 but we can't say whether it's a multiple of 500 or NOT

Hence, NOT SUFFICIENT

Combining the two statements:

Case 1: z= 20 and y= 10 i.e. yz=100 but NOT a multiple of 500

Case 2: z= 100 and y= 10 i.e. yz=1000 i.e. a multiple of 500

NOT SUFFICIENT

Answer: option
_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Manager
Manager
avatar
Joined: 27 Dec 2013
Posts: 237
Re: The integers y and z are both positive. Is yz a multiple of 500?  [#permalink]

Show Tags

New post 16 Jun 2015, 01:38
Nice Question. Took me time but yes the answer is E.

I primarily tried always to negate the given criteria by picking the numbers, worked well.

the only doubt I have is, can this be a 600 level questions, i mean considering the difficulty range.


Gmatdecoder wrote:
The integers y and z are both positive. Is yz a multiple of 500?

(1) yz is a multiple of 25 and z is a multiple of 20.

(2) y^2 is a multiple of 10 and z^2 is a multiple of 5.

_________________

Kudos to you, for helping me with some KUDOS.

CEO
CEO
User avatar
P
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2722
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Reviews Badge
Re: The integers y and z are both positive. Is yz a multiple of 500?  [#permalink]

Show Tags

New post 16 Jun 2015, 01:55
shriramvelamuri wrote:
Nice Question. Took me time but yes the answer is E.

I primarily tried always to negate the given criteria by picking the numbers, worked well.

the only doubt I have is, can this be a 600 level questions, i mean considering the difficulty range.


Gmatdecoder wrote:
The integers y and z are both positive. Is yz a multiple of 500?

(1) yz is a multiple of 25 and z is a multiple of 20.

(2) y^2 is a multiple of 10 and z^2 is a multiple of 5.


I would call it a 650 level question because neither it's that easy that it should be 600 level nor it's so difficult to be called a 700 level.
_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 9405
Premium Member
Re: The integers y and z are both positive. Is yz a multiple of 500?  [#permalink]

Show Tags

New post 31 Dec 2018, 03:24
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.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

GMAT Club Bot
Re: The integers y and z are both positive. Is yz a multiple of 500? &nbs [#permalink] 31 Dec 2018, 03:24
Display posts from previous: Sort by

The integers y and z are both positive. Is yz a multiple of 500?

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


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.