Magoosh
2k years ago Frank was 3k years old. In k years Frank's age, in years, will be
A. 4k
B. 5k
C. 6k
D. 7k
E. 8k
OA C.
2k years ago Frank was 3k years old. In k years Frank's age,
This topic has expert replies
- GMATGuruNY
- GMAT Instructor
- Posts: 15539
- Joined: Tue May 25, 2010 12:04 pm
- Location: New York, NY
- Thanked: 13060 times
- Followed by:1906 members
- GMAT Score:790
Let k=10.AAPL wrote:Magoosh
2k years ago Frank was 3k years old. In k years Frank's age, in years, will be
A. 4k
B. 5k
C. 6k
D. 7k
E. 8k
2k years ago Frank was 3k years old.
Since k=10, 20 years ago Frank was 30 years old, implying that his age now = 30+20 = 50.
In k years Frank's age, in years, will be:
Since Frank is now 50 years old, Frank's age in 10 years = 50+10 = 60.
The correct answer must yield a value of 60 when k=10.
Only C works:
6k = 6*10 = 60.
The correct answer is C.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
GMAT/MBA Expert
- Brent@GMATPrepNow
- GMAT Instructor
- Posts: 16207
- Joined: Mon Dec 08, 2008 6:26 pm
- Location: Vancouver, BC
- Thanked: 5254 times
- Followed by:1268 members
- GMAT Score:770
These kinds of questions (Variables in the Answer Choices - VIACs) can be answered algebraically or using the input-output approach.AAPL wrote:2k years ago Frank was 3k years old. In k years Frank's age, in years, will be
A. 4k
B. 5k
C. 6k
D. 7k
E. 8k
Mitch has solved the question using the input-output approach, so let's use the algebraic approach.
2k years ago Frank was 3k years old.
We're given Frank's age 2k YEARS AGO.
So, Frank's PRESENT age = 3k + 2k = 5k
In k years Frank's age, in years, will be
In k years, Frank will be k years older than his CURRENT age.
So, IN k YEARS, Frank's age will equal 5k + k = 6k
Answer: C
Cheers,
Brent
GMAT/MBA Expert
- Scott@TargetTestPrep
- GMAT Instructor
- Posts: 7247
- Joined: Sat Apr 25, 2015 10:56 am
- Location: Los Angeles, CA
- Thanked: 43 times
- Followed by:29 members
Let F = Frank's age now. So we have:AAPL wrote:Magoosh
2k years ago Frank was 3k years old. In k years Frank's age, in years, will be
A. 4k
B. 5k
C. 6k
D. 7k
E. 8k
OA C.
F- 2k = 3k
F = 5k
Therefore, in k years, Frank will be F + k = 5k + k = 6k years old.
Answer: C
Scott Woodbury-Stewart
Founder and CEO
[email protected]
See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews