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

It is currently 17 Aug 2018, 12:37

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

How old will jack be when he retires 20 years from now, if the average

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

Hide Tags

Manager
Manager
User avatar
S
Joined: 16 Jan 2018
Posts: 56
Location: New Zealand
Premium Member
How old will jack be when he retires 20 years from now, if the average  [#permalink]

Show Tags

New post 28 Jul 2018, 00:23
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

58% (00:44) correct 42% (00:34) wrong based on 26 sessions

HideShow timer Statistics

How old will jack be when he retires 20 years from now, if the average of his current age and the retirement age is 50?

A. 40

B. 50

C. 60

D. 55

E. 65
BSchool Forum Moderator
User avatar
V
Joined: 26 Feb 2016
Posts: 3040
Location: India
GPA: 3.12
Premium Member CAT Tests
How old will jack be when he retires 20 years from now, if the average  [#permalink]

Show Tags

New post 28 Jul 2018, 00:28
1
blueviper wrote:
How old will jack be when he retires 20 years from now, if the average of his current age and the retirement age is 50?

A. 40

B. 50

C. 60

D. 55

E. 65


If Jack is x years old now, when he retires 20 years from now, his age will be x+20

We are given that the average of his current age and retirement age is 50
(i.e.) \(\frac{x + x + 20}{2} = 50\) -> \(2x + 20 = 100\) -> \(x = \frac{80}{2} = 40\)

Therefore, Jack's age during retirement is x + 20 or 60(Option C)


blueviper - The answer options in GMAT PS questions are always arranged in ascending order!
Please keep that in mind whenever you post questions from now on
_________________

You've got what it takes, but it will take everything you've got

Senior Manager
Senior Manager
User avatar
P
Joined: 24 Jun 2012
Posts: 343
Location: Pakistan
Concentration: Strategy, International Business
GPA: 3.76
GMAT ToolKit User Reviews Badge
How old will jack be when he retires 20 years from now, if the average  [#permalink]

Show Tags

New post 28 Jul 2018, 01:17
Its easy
let r be his retirement age and c his current age
R = C + 20
average is given as (C+R)/2 = 50------> C+R = 100
so we can write C +C+20 = 100
solving C = 40
R = 40+20 = 60 C is answer
_________________

Push yourself again and again. Don't give an inch until the final buzzer sounds. -Larry Bird
Success isn't something that just happens - success is learned, success is practiced and then it is shared. -Sparky Anderson
-S

Intern
Intern
avatar
Joined: 26 Jul 2018
Posts: 1
How old will jack be when he retires 20 years from now, if the average  [#permalink]

Show Tags

New post 17 Aug 2018, 11:09
Given: [Current Age (A) + Retirement Age (R)] / 2 = 50

So, A + R = 100

or A = 100 - R, this is our first equation.

Now, R - A = 20

or A = R - 20, this is the second equation.

So, combining both the equations, we get, 100 - R = R - 20

Which gives, 2R = 120 or R = 60.

Answer is option C.
How old will jack be when he retires 20 years from now, if the average &nbs [#permalink] 17 Aug 2018, 11:09
Display posts from previous: Sort by

How old will jack be when he retires 20 years from now, if the average

  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®.