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

It is currently 21 Sep 2018, 07:17

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

If z is a prime number and y = 24z, then the least common multiple of

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

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49300
If z is a prime number and y = 24z, then the least common multiple of  [#permalink]

Show Tags

New post 12 Dec 2016, 12:40
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

74% (00:51) correct 26% (01:44) wrong based on 109 sessions

HideShow timer Statistics

Senior Manager
Senior Manager
avatar
B
Joined: 13 Oct 2016
Posts: 367
GPA: 3.98
Re: If z is a prime number and y = 24z, then the least common multiple of  [#permalink]

Show Tags

New post 12 Dec 2016, 14:10
1
\(y = 24z = 2^3*3*z\)

\(a = 10z = 2*5*z\)

\(LCM (y, a) = 2^3*3*5*z = 120z\)

Answer B
Manager
Manager
avatar
S
Joined: 27 Aug 2016
Posts: 91
Location: India
Schools: HEC Montreal '21
GMAT 1: 670 Q47 V37
GPA: 3
WE: Engineering (Energy and Utilities)
GMAT ToolKit User
Re: If z is a prime number and y = 24z, then the least common multiple of  [#permalink]

Show Tags

New post 19 Apr 2017, 12:05
[quote="Bunuel"]If z is a prime number and y = 24z, then the least common multiple of y and 10z, in terms of z, is

A. 240z
B. 120z
C. 60z
D. 30z
E. 10z[/quote

Hi,
y=24z may also imply that y is a three digit number with units place z...implying thereby
y= 242,243,245,247

why are we assuming that y=24z is 24*z....??
pl elaborate?
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49300
Re: If z is a prime number and y = 24z, then the least common multiple of  [#permalink]

Show Tags

New post 19 Apr 2017, 12:14
saurabhsavant wrote:
Bunuel wrote:
If z is a prime number and y = 24z, then the least common multiple of y and 10z, in terms of z, is

A. 240z
B. 120z
C. 60z
D. 30z
E. 10z[/quote

Hi,
y=24z may also imply that y is a three digit number with units place z...implying thereby
y= 242,243,245,247

why are we assuming that y=24z is 24*z....??
pl elaborate?


If it were a three-digit number it would have been explicitly stated. Without that 24z can only mean 24*z.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Re: If z is a prime number and y = 24z, then the least common multiple of &nbs [#permalink] 19 Apr 2017, 12:14
Display posts from previous: Sort by

If z is a prime number and y = 24z, then the least common multiple of

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

Events & Promotions

PREV
NEXT


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®.