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

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATBootcamp Starts Sep 28
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE BOOTCAMP

Live Online Bootcamp Class with Top GMAT Expert Chris Peckover

15 live classes from Sep 28, 2026

Schedule
Mon to Fri · 7:00 to 10:00 PM ET
Included
Live classes + 6 months of TTP OnDemand
  • Boost your GMAT score in less than one month in a live online class
  • 6 months access to TTP OnDemand video courses included
View bootcamp & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

cost problem -help!

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Thu Feb 10, 2011 9:19 pm
by GMATST » Mon Mar 21, 2011 10:29 am
I just can't figure out how to set up the equation properly to solve for this:

Three types of pencils J, K, and L cost $0.05, $0.10, and $0.25. If a box of 32 of these pencils costs a total of $3.40 and if there are twice as many K pencils as L pencils in the box, how many J pencils are there?

A) 6
B) 12
C) 14
D) 18
E 20
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Quantitative Reasoning |
User avatar
GMAT Instructor
Posts: 1035
Joined: Fri Dec 17, 2010 11:13 amFollowed by: 365 members
Location: Los Angeles, CA
Thanked: 474 times

by VivianKerr » Mon Mar 21, 2011 12:55 pm
.05j + .10k + .25l = $3.40

j + k + l = 32

2l = k

Plug the third equation into the 1st and 2nd equations and simplify:

.05j + .2l + .25l = 3.40
.05j + .45l = 3.40
5j + 45l = 340
j + 9l = 68

j + 2l + l = 32
j + 3l = 32

Now we have two equations with two variables. We can solve for j.

j + 9l = 68
- (j + 3l = 32)

6l = 36
l = 6

Plug l back in to solve for j.

j + 9(6) = 68
j + 54 = 68
j = 14
Vivian Kerr
GMAT Rockstar, Tutor
https://www.GMATrockstar.com
https://www.yelp.com/biz/gmat-rockstar-los-angeles

Former Kaplan and Grockit instructor, freelance GMAT content creator, now offering affordable, effective, Skype-tutoring for the GMAT at $150/hr. Contact: [email protected]

Thank you for all the "thanks" and "follows"! :-)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 582
Joined: Tue Mar 08, 2011 12:48 amFollowed by: 6 members
Thanked: 61 times
GMAT Score:740

by force5 » Mon Mar 21, 2011 1:00 pm
Nicely done Vivian

IMO= 14
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 61
Joined: Sun Mar 13, 2011 12:34 pm
Thanked: 1 times

by luiscarlos59 » Fri Mar 25, 2011 8:25 am
Hi
Im not 100% sure

But i increased the decimals on the equations to look something like this
5j+10k+25l=340

And got J=20. L=8 and k=4

Which satisfies the above equation..
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 61
Joined: Sun Mar 13, 2011 12:34 pm
Thanked: 1 times

by luiscarlos59 » Fri Mar 25, 2011 7:02 pm
My answer is different. Whats the OA?

Mariana do you know it?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Thu Feb 10, 2011 9:19 pm

by GMATST » Mon Mar 28, 2011 9:20 am
The OA is 14
Thanks for your effort!

Vivian, I was just wondering why 'if there are twice as many K pencils as L pencils' the equation is 2L = K as opposed to 2K = L. Your equation works and yields the right answer but can you please explain to me the concept behind this? I seem to struggle with the wording of questions sometimes.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1