BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

HELP : Algebra Question!

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Sun Feb 08, 2009 7:59 pm
Location: New York
by KevinTheGMAT » Sun Feb 08, 2009 8:13 pm
Hey! Im a 13 year old boy...and Im not afraid to admit it. Well, Im having a really hard time with this question. Would you please help me?

My father is 24 years older than I am. In two years, he will be three times as old as I am. How old is each of us, now?

Thanks again for helping me with this question.
Please tell me how to figure it out and the answer! :(
Party like a math geek!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
Senior | Next Rank: 100 Posts
Posts: 59
Joined: Fri Feb 29, 2008 9:00 am
Thanked: 4 times

by agoyal2 » Sun Feb 08, 2009 8:36 pm
Take:
Child = x
Fater = x+24

After 3 Years:
Child = x+3
Father = x+24 +3

As per the given relationship:
x+27 = 3(x+3)
x+27=3x+9
2x=18
x=9

So, Child = 9 Yrs and Father 33 Yrs
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 2623
Joined: Mon Jun 02, 2008 3:17 amFollowed by: 355 members
Location: Montreal
Thanked: 1090 times
GMAT Score:780

by Ian Stewart » Sun Feb 08, 2009 8:55 pm
agoyal2 wrote:
After 3 Years:
Child = x+3
Father = x+24 +3

...
So, Child = 9 Yrs and Father 33 Yrs
Nice work agoyal, but I think you misread one word in the question:
KevinTheGMAT wrote: My father is 24 years older than I am. In two years, he will be three times as old as I am. How old is each of us, now?
So, the child should be 10, the father 34, so that in two years they will be 12 and 36. The algebra (just editing agoyal's work):

Child = x
Father = x+24

After 2 years:
Child = x+2
Father = x+24 +2 = x+26

Since the Father's age is three times the Child's age after 2 years:
x+26 = 3(x+2)
x+26=3x+6
2x=20
x=10
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

ianstewartgmat.com
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 59
Joined: Fri Feb 29, 2008 9:00 am
Thanked: 4 times

by agoyal2 » Mon Feb 09, 2009 12:24 am
Oops! My bad.. I hope I don't make these mistakes when taking the test. Thanks for correcting me Ian!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Sun Feb 08, 2009 7:59 pm
Location: New York

by KevinTheGMAT » Mon Feb 09, 2009 4:14 pm
Thanks guys! This really helped me... :D
Party like a math geek!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1