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

It is currently 18 Feb 2019, 02:17

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
Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
  • Valentine's day SALE is on! 25% off.

     February 18, 2019

     February 18, 2019

     10:00 PM PST

     11:00 PM PST

    We don’t care what your relationship status this year - we love you just the way you are. AND we want you to crush the GMAT!
  • Get FREE Daily Quiz for 2 months

     February 18, 2019

     February 18, 2019

     10:00 PM PST

     11:00 PM PST

    Buy "All-In-One Standard ($149)", get free Daily quiz (2 mon). Coupon code : SPECIAL

If 10^x equals 0.1 percent of 10^y, where x and y are integers, which

  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: 52917
If 10^x equals 0.1 percent of 10^y, where x and y are integers, which  [#permalink]

Show Tags

New post 15 Jul 2018, 07:42
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

63% (01:26) correct 37% (01:25) wrong based on 120 sessions

HideShow timer Statistics

If 10^x equals 0.1 percent of 10^y, where x and y are integers, which of the following must be true?

A. y = x + 2
B. y = x + 3
C. x = y + 3
D. y = 1,000x
E. x = 1,000y

_________________

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

Retired Moderator
avatar
D
Joined: 25 Feb 2013
Posts: 1216
Location: India
GPA: 3.82
GMAT ToolKit User Premium Member Reviews Badge
If 10^x equals 0.1 percent of 10^y, where x and y are integers, which  [#permalink]

Show Tags

New post 15 Jul 2018, 07:49
1
Bunuel wrote:
If 10^x equals 0.1 percent of 10^y, where x and y are integers, which of the following must be true?

A. y = x + 2
B. y = x + 3
C. x = y + 3
D. y = 1,000x
E. x = 1,000y


\(10^x=0.1\)%\(*10^y\)

\(=>10^x=\frac{0.1}{100}*10^y=>10^x*100=10^{-1}*10^y\)

\(=>10^{x+2}=10^{y-1}\)

\(=>x+2=y-1 => y=x+3\)

Option B
VP
VP
User avatar
P
Joined: 31 Oct 2013
Posts: 1128
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
If 10^x equals 0.1 percent of 10^y, where x and y are integers, which  [#permalink]

Show Tags

New post 15 Jul 2018, 09:44
1
Bunuel wrote:
If 10^x equals 0.1 percent of 10^y, where x and y are integers, which of the following must be true?

A. y = x + 2
B. y = x + 3
C. x = y + 3
D. y = 1,000x
E. x = 1,000y



Given

10^x equals 0.1 percent of 10^y.

So, we can translate into equation.


\(10^x\) = 0.1% * \(10^y\)

\(10^x\) = (0.1 /100)* \(10^y\)

\(10^x\) = 0.001 *\(10^y\)

\(10^x\) = 1*\(10^{y-3}\)

\(10^x\) = \(10^{y-3}\)

x = y-3

y = x+3

Thus the best answer is B.
VP
VP
User avatar
V
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1398
Location: India
Concentration: International Business, Operations
Schools: INSEAD Jan '19
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Real Estate)
Premium Member Reviews Badge
Re: If 10^x equals 0.1 percent of 10^y, where x and y are integers, which  [#permalink]

Show Tags

New post 20 Jul 2018, 00:13
Bunuel wrote:
If 10^x equals 0.1 percent of 10^y, where x and y are integers, which of the following must be true?

A. y = x + 2
B. y = x + 3
C. x = y + 3
D. y = 1,000x
E. x = 1,000y


\(10^x\) \(=\) \(\frac{0.1}{100}\) \(*\) \(10^y\)

\(10^x = \frac{1}{1000} * 10^y\)

\(10^x = 10^{-3} * 10^y\)

\(x = -3 + y\)

\(y = x + 3\)

(B)
_________________

"Do not watch clock; Do what it does. KEEP GOING."

Senior Manager
Senior Manager
User avatar
P
Joined: 04 Jun 2018
Posts: 417
Location: Germany
Concentration: General Management, Finance
GPA: 3.6
WE: Analyst (Transportation)
Premium Member Reviews Badge CAT Tests
Re: If 10^x equals 0.1 percent of 10^y, where x and y are integers, which  [#permalink]

Show Tags

New post 05 Jan 2019, 04:36
selim wrote:
Bunuel wrote:
If 10^x equals 0.1 percent of 10^y, where x and y are integers, which of the following must be true?

A. y = x + 2
B. y = x + 3
C. x = y + 3
D. y = 1,000x
E. x = 1,000y



Given

10^x equals 0.1 percent of 10^y.

So, we can translate into equation.


\(10^x\) = 0.1% * \(10^y\)

\(10^x\) = (0.1 /100)* \(10^y\)

\(10^x\) = 0.001 *\(10^y\)

\(10^x\) = 1*\(10^{y-3}\)

\(10^x\) = \(10^{y-3}\)

x = y-3

y = x+3

Thus the best answer is B.


Thank you for the explanation, that made the problem quite clear.

Although, I have to admit it feels weird learning math from Johnny Sins. :lol:
_________________

A couple of things that helped me in verbal:
https://gmatclub.com/forum/verbal-strategies-268700.html#p2082192

Gmat Prep CAT #1: V42, Q34, 630
Gmat Prep CAT #2: V46, Q35, 660
Gmat Prep CAT #3: V41, Q42, 680

On the mission to improve my quant score, all help is appreciated! :)

SVP
SVP
User avatar
G
Joined: 18 Aug 2017
Posts: 1792
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
GMAT ToolKit User Premium Member CAT Tests
Re: If 10^x equals 0.1 percent of 10^y, where x and y are integers, which  [#permalink]

Show Tags

New post 27 Jan 2019, 04:48
Bunuel wrote:
If 10^x equals 0.1 percent of 10^y, where x and y are integers, which of the following must be true?

A. y = x + 2
B. y = x + 3
C. x = y + 3
D. y = 1,000x
E. x = 1,000y


10^x=10^-3*10^y
x=-3+y
y=x+3
IMO B
_________________

If you liked my solution then please give Kudos. Kudos encourage active discussions.

GMAT Club Bot
Re: If 10^x equals 0.1 percent of 10^y, where x and y are integers, which   [#permalink] 27 Jan 2019, 04:48
Display posts from previous: Sort by

If 10^x equals 0.1 percent of 10^y, where x and y are integers, which

  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®.