Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Sep 0609:30 AM EDT
-12:30 PM EST
Top scores are possible when you enroll in a powerful EA course, taught live online + 6 months access to TTP OnDemand video courses included! Perfect class schedule and easy course access for working professionals. Class starts Sundays Sept. 6, 2026.
Sep 0201:00 PM EDT
-11:59 PM EDT
Take 30% off all study plans with code COURSEWORK - Expires on Monday 9/7
Sep 0401:30 AM EDT
-02:30 AM EDT
This Labor Day, turn your hard work into real score gains. From 615→715 in 15 days to 705 in 30 days, our students prove what's possible with personalized, expert guidance. Save up to 25% on 1-on-1 tutoring.
Sep 0410:00 AM EDT
-11:59 PM EDT
We’ve worked incredibly hard to build TTP into the best test prep experience possible, and it would mean a lot to us to win Newsweek’s 2026 Readers’ Choice Award for Best Test Prep. If TTP has helped you, we’d be incredibly grateful for your vote.
Sep 0712:01 AM PDT
-11:59 PM PDT
On the 7th, GMAT Club Tests will be Free! Including all the Quizzes, Questions, and Tests. 12 AM - 11:59 PM PDT
Sep 0712:30 AM EDT
-01:30 AM EDT
Tejas studied hard but kept repeating the same mistakes. After 3 attempts at 645, a focused 4-week strategy helped him identify and fix what was holding him back—leading to a 695 with just 12–15 hours of study per week.- Sep 07
10:00 AM PDT
-11:00 AM PDT
A complete walkthrough of GMAT Club’s free 12-week GMAT study plan: what you study each week, how progress and goals are tracked, how the error log works, and how your practice unlocks paid tools at no cost. - Sep 09
07:00 AM PDT
-10:00 AM PDT
Meet AdComs and explore top Master’s programs - MiM, MiF, MSc, MSBA and more. - Application Fee Waivers - Free 1-Week of GMAT Club Tests: - Master's Application Toolkit - Grand Prize Giveaway - Sep 09
10:00 AM PDT
-11:00 AM PDT
Three MBA applications. Three rejections. No interview invites. A year later, Aman was admitted to Cambridge Judge, SMU, and IMD. In this episode of MBA Admit Stories, Aman shares how he rebuilt his MBA application... 
Sep 1008:00 PM PDT
-09:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
Sep 1507:00 PM EDT
-09:00 PM EST
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Tues/Thurs Sept. 15, 2026 - Nov. 15, 2027, 7:00pm-9:00pm EST
Sep 2108:00 PM EDT
-10:00 PM EDT
Boost your GMAT score in less than one month in a live online class + 6 months access to TTP OnDemand video courses included! Class starts Mon, Tues, Wed, Thur, Fri Sept. 21, 2026 - Oct. 9, 2027, 7:00pm-10:00pm EST
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
62% (02:59) correct
38%
(03:23)
wrong
based on 66
sessions
History
Date
Time
Result
Not Attempted Yet
Minho, Jisoo, and Taeyang are assigned the task of adjusting insurance policy premiums. Minho would take 1 hour longer than Jisoo to complete the task but one-third as long as Taeyang . If they worked in pairs, Minho and Taeyang would take 75 percent longer than Taeyang and Jisoo.
If Minho, Jisoo, and Taeyang worked together, how long would it take them to complete the task ?
A. 30 minutes
B. 36 minutes
C. 45 minutes
D. 72 minutes
E. 120 minutes
If Minho, Jisoo, and Taeyang worked together, how long would it take them to complete the task ?
A. 30 minutes
B. 36 minutes
C. 45 minutes
D. 72 minutes
E. 120 minutes
10 Mar 2026, 01:55
Kudos
Bookmarks
Great Work and Rate problem — this one tests a concept I call "decoding relative time statements before setting up equations."
Key concept: Work Rate problems with relative time comparisons (Problem Solving).
Step 1 — Assign variables based on given relationships.
Let Jisoo's time = J hours.
- Minho takes 1 hour longer than Jisoo → M = J + 1
- Minho takes one-third as long as Taeyang → M = T/3, so T = 3M = 3(J + 1)
Step 2 — Set up the combined pair times.
When two people work together, combined time = (A × B)/(A + B).
- Minho + Taeyang time = (J+1) × 3(J+1) / ((J+1) + 3(J+1)) = 3(J+1)2/4(J+1) = 3(J+1)/4
- Taeyang + Jisoo time = 3(J+1) × J / (3(J+1) + J) = 3J(J+1)/(4J+3)
Step 3 — Apply the "75% longer" condition.
"75% longer" means M+T pair time = 1.75 × T+J pair time:
3(J+1)/4 = 1.75 × 3J(J+1)/(4J+3)
Divide both sides by (J+1) [valid since J > 0]:
3/4 = 5.25J/(4J+3)
3(4J+3) = 21J
12J + 9 = 21J
J = 1 hour
Step 4 — Find individual times.
Jisoo = 1 hour (60 min), Minho = 2 hours (120 min), Taeyang = 3 × 2 = 6 hours (360 min)
Step 5 — Calculate combined rate for all three.
Combined rate = 1/1 + 1/2 + 1/6 = 6/6 + 3/6 + 1/6 = 10/6 per hour
Combined time = 6/10 hours = 0.6 hours = 36 minutes
Answer: B (36 minutes)
Common trap: Students read "Minho takes one-third as long as Taeyang" and write T = 3J (mistakenly linking to Jisoo rather than Minho). Always track exactly who each comparison refers to. Here, both comparisons are about Minho: 1 hour longer than Jisoo, one-third as long as Taeyang.
Takeaway: In multi-person rate problems, express every individual time in terms of one variable first — then build combined-pair equations. Trying to work with multiple variables simultaneously is where most errors sneak in.
Key concept: Work Rate problems with relative time comparisons (Problem Solving).
Step 1 — Assign variables based on given relationships.
Let Jisoo's time = J hours.
- Minho takes 1 hour longer than Jisoo → M = J + 1
- Minho takes one-third as long as Taeyang → M = T/3, so T = 3M = 3(J + 1)
Step 2 — Set up the combined pair times.
When two people work together, combined time = (A × B)/(A + B).
- Minho + Taeyang time = (J+1) × 3(J+1) / ((J+1) + 3(J+1)) = 3(J+1)2/4(J+1) = 3(J+1)/4
- Taeyang + Jisoo time = 3(J+1) × J / (3(J+1) + J) = 3J(J+1)/(4J+3)
Step 3 — Apply the "75% longer" condition.
"75% longer" means M+T pair time = 1.75 × T+J pair time:
3(J+1)/4 = 1.75 × 3J(J+1)/(4J+3)
Divide both sides by (J+1) [valid since J > 0]:
3/4 = 5.25J/(4J+3)
3(4J+3) = 21J
12J + 9 = 21J
J = 1 hour
Step 4 — Find individual times.
Jisoo = 1 hour (60 min), Minho = 2 hours (120 min), Taeyang = 3 × 2 = 6 hours (360 min)
Step 5 — Calculate combined rate for all three.
Combined rate = 1/1 + 1/2 + 1/6 = 6/6 + 3/6 + 1/6 = 10/6 per hour
Combined time = 6/10 hours = 0.6 hours = 36 minutes
Answer: B (36 minutes)
Common trap: Students read "Minho takes one-third as long as Taeyang" and write T = 3J (mistakenly linking to Jisoo rather than Minho). Always track exactly who each comparison refers to. Here, both comparisons are about Minho: 1 hour longer than Jisoo, one-third as long as Taeyang.
Takeaway: In multi-person rate problems, express every individual time in terms of one variable first — then build combined-pair equations. Trying to work with multiple variables simultaneously is where most errors sneak in.
02 Jul 2026, 06:05
Kudos
Bookmarks
One quick was you can do this would be to assume the hours
Let time taken by
Minho is x
Jiso is x -1 hrs
T is 3x
*** Note if M+T take 75% more time than T and J that means their output is 1/1.75 times T and J
As per the question the following equation would hold
1/x + 1/(x-1) = 1/(1.75) * (1/(x-1)+ 1/(3x)
Solving this you get x = 2
Hence rate would be 1/2 + 1+1/6 which is 10/6
Hence time taken would be 6/10 which is 3/5 hours or 36 mins Answer is B
Let time taken by
Minho is x
Jiso is x -1 hrs
T is 3x
*** Note if M+T take 75% more time than T and J that means their output is 1/1.75 times T and J
As per the question the following equation would hold
1/x + 1/(x-1) = 1/(1.75) * (1/(x-1)+ 1/(3x)
Solving this you get x = 2
Hence rate would be 1/2 + 1+1/6 which is 10/6
Hence time taken would be 6/10 which is 3/5 hours or 36 mins Answer is B
