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

It is currently 20 Aug 2018, 03:52

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

Judy is now twice as old as Adam, but 6 years ago, she was 5 times as

  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: 48044
Judy is now twice as old as Adam, but 6 years ago, she was 5 times as  [#permalink]

Show Tags

New post 08 Jul 2018, 23:09
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

71% (01:12) correct 29% (01:38) wrong based on 17 sessions

HideShow timer Statistics

Most Helpful Community Reply
Intern
Intern
avatar
B
Joined: 23 Jul 2017
Posts: 5
CAT Tests
Re: Judy is now twice as old as Adam, but 6 years ago, she was 5 times as  [#permalink]

Show Tags

New post 09 Jul 2018, 02:11
5
Let the current age of Judy = X
Let the current age of Adam = Y

The first statement says that X=2Y

Also, 6 years ago, Judy was 5 times as old as Adam was
Therefore (X-6) = 5(Y-6)
2Y-6=5Y-30
3Y=24
Y=8
X=2*8 = 16

Therefore, the answer is option B
General Discussion
RC Moderator
User avatar
P
Status: Perfecting myself for GMAT
Joined: 22 May 2017
Posts: 446
Concentration: Nonprofit
Schools: Haas '21
GPA: 4
WE: Engineering (Computer Software)
GMAT ToolKit User Premium Member CAT Tests
Judy is now twice as old as Adam, but 6 years ago, she was 5 times as  [#permalink]

Show Tags

New post 08 Jul 2018, 23:14
Let J and A be current ages of Judy and Adam respectively

Judy is now twice as old as Adam --- > J = 2A

6 years ago, Judy was 5 times as old as Adam was ---> J-6 = 5(A-6)

Solving both the equations A=8 and J = 16

Hence option B
_________________

If you like my post press kudos +1

New - RC Butler - 2 RC's everyday

Tag me in RC questions if you need help. Please provide your analysis of the question in the post along with the tag.

e-GMAT Representative
User avatar
P
Joined: 04 Jan 2015
Posts: 1900
Re: Judy is now twice as old as Adam, but 6 years ago, she was 5 times as  [#permalink]

Show Tags

New post 08 Jul 2018, 23:19

Solution



Given:
    • Judy is now twice as old as Adam
    • 6 years ago, Judy was 5 times as old as Adam was

To find:
    • Present age of Judy

Approach and Working:
If we assume the age of Adam 6 years back was x, then Judy was 5x at that time
    • Present age of Adam = x + 6
    • Present age of Judy = 5x + 6

Given that,
    • 5x + 6 = 2 (x + 6)
    Or, 5x + 6 = 2x + 12
    Or, 3x = 6
    Or, x = 2

Therefore, present age of Judy = 5x + 6 = 5 * 2 + 6 = 16

Hence, the correct answer is option B.

Answer: B
_________________








Register for free sessions
Number Properties | Algebra |Quant Workshop

Success Stories
Guillermo's Success Story | Carrie's Success Story

Ace GMAT quant
Articles and Question to reach Q51 | Question of the week

Must Read Articles
Number Properties – Even Odd | LCM GCD
Word Problems – Percentage 1 | Percentage 2 | Time and Work 1 | Time and Work 2 | Time, Speed and Distance 1 | Time, Speed and Distance 2
Advanced Topics- Permutation and Combination 1 | Permutation and Combination 2 | Permutation and Combination 3 | Probability
Geometry- Triangles 1 | Triangles 2 | Triangles 3 | Common Mistakes in Geometry
Algebra- Wavy line

Practice Questions
Number Properties 1 | Number Properties 2 | Algebra 1 | Geometry | Prime Numbers | Absolute value equations | Sets



| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

Senior Manager
Senior Manager
User avatar
P
Joined: 07 Jul 2012
Posts: 355
Location: India
Concentration: Finance, Accounting
GPA: 3.5
Premium Member
Re: Judy is now twice as old as Adam, but 6 years ago, she was 5 times as  [#permalink]

Show Tags

New post 09 Jul 2018, 02:56
Let Adam's age= x
..... Judy's.......= 2x

Six years ago,

2x-6= 5(x-6)
2x-6= 5x-30
5x-2x= 30-6
3x= 24
x= \(\frac{24}{3}\)= 8

Judy's present age= 2x= 2*8= 16

Answer: B.
_________________

Kindly hit kudos if my post helps!

Re: Judy is now twice as old as Adam, but 6 years ago, she was 5 times as &nbs [#permalink] 09 Jul 2018, 02:56
Display posts from previous: Sort by

Judy is now twice as old as Adam, but 6 years ago, she was 5 times as

  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®.