Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
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.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
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 Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart 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 563 reviewsTarget Test Prep

At a conference, the only events scheduled for the day...

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Moderator
Posts: 2749
Joined: Sun Oct 29, 2017 2:08 pmFollowed by: 2 members
by AAPL » Wed Mar 14, 2018 7:57 am
At a conference, the only events scheduled for the day are seminars and breaks. All seminars are the same length and are 10 times as long as each break. A break must be between two consecutive seminars. if the first seminar begins at 9:00 am and the third one ends at 11:40 am, how long will the conference last if there are a total of 6 seminars that day?

A. 5 hours and 15 minutes
B. 5 hours and 20 minutes
C. 5 hours and 25 minutes
D. 5 hours and 30 minutes
E. 5 hours and 35 minutes

The OA is C.

Experts, shouldn't the answer be 5 hours 20 mins?

Break = b
Seminar= 10b

9am to 11:40am = 160mins

3s+b=160
30b+b=160
b=160/31

6 seminar will take

6s+2b

=60b+2b

=62b

=62*160/31

=320

=5 hours 20 minutes.

I don't have clear this PS question. I appreciate if any expert explains it to me. Thank you so much.
Top
Join the discussion
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
Legendary Member
Posts: 503
Joined: Thu Jul 20, 2017 9:03 amFollowed by: 15 members
Thanked: 86 times
GMAT Score:770

by ErikaPrepScholar » Wed Mar 14, 2018 9:27 am
Hey AAPL,

You're on the right track with creating these equations. However, it's important to note that the question tells us that breaks are scheduled between 2 consecutive seminars — this means that we should never have 2 seminars in a row without a break between them. So from 9am to 11:40, there should be 3 seminars and 2 breaks, and in total, there should be 6 seminars and 5 breaks.

This gives us
3s+2b=160

If s = 10b, then
30b+2b=160
32b=160
b=160/32

6 seminars will take
6s+5b
=60b+5b
=65b
=65*160/32
=325
=5 hours 25 minutes.
Image

Erika John - Content Manager/Lead Instructor
https://gmat.prepscholar.com/gmat/s/

Get tutoring from me or another PrepScholar GMAT expert: https://gmat.prepscholar.com/gmat/s/tutoring/

Learn about our exclusive savings for BTG members (up to 25% off) and our 5 day free trial

Check out our PrepScholar GMAT YouTube channel, and read our expert guides on the PrepScholar GMAT blog
Top
Join the discussion

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8246
Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members
Location: Los Angeles, CA
Thanked: 43 times

by Scott@TargetTestPrep » Thu Mar 15, 2018 9:19 am
AAPL wrote:At a conference, the only events scheduled for the day are seminars and breaks. All seminars are the same length and are 10 times as long as each break. A break must be between two consecutive seminars. if the first seminar begins at 9:00 am and the third one ends at 11:40 am, how long will the conference last if there are a total of 6 seminars that day?

A. 5 hours and 15 minutes
B. 5 hours and 20 minutes
C. 5 hours and 25 minutes
D. 5 hours and 30 minutes
E. 5 hours and 35 minutes
We can let x = the length, in minutes, of a break; thus, 10x = the length, in minutes, of a seminar. Since the first seminar begins at 9:00 am and the third one ends at 11:40 am, the time elapsed is 2 hours 40 minutes, or 160 minutes. This means that the total length of 3 seminars and 2 breaks is 160 minutes. We can translate this into an equation:

3(10x) + 2x = 160

32x = 160

x = 5

So each break is 5 minutes long and each seminar is 5(10) = 50 minutes long. If a day has a total of 6 seminars, it will have 5 breaks and, thus, a day of 6 seminars and 5 breaks will last

6(50) + 5(5) = 325 minutes = 5 hours 25 minutes

Answer: C
Top
Join the discussion