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 0410:00 AM PDT
-11:00 AM PDT
What does test anxiety really look like on the GMAT? For many test takers, it does not look like a panic attack. Instead, it shows up as brain fog, rereading, negative comparisons, mental noise....
Sep 0201:00 PM EDT
-11:59 PM EDT
Take 30% off all study plans with code COURSEWORK - Expires on Monday 9/7
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 07
12:01 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 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 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
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
62% (01:44) correct
38%
(01:54)
wrong
based on 209
sessions
History
Date
Time
Result
Not Attempted Yet
The number A is a two-digit positive integer; the number B is the two-digit positive integer formed by reversing the digits of A. if Q=10B-A, what is the value of Q?
(1) The tens digit of A is 7
(2) The tens digit of B is 6
Are You Up For the Challenge: 700 Level Questions
_________________
(1) The tens digit of A is 7
(2) The tens digit of B is 6
Are You Up For the Challenge: 700 Level Questions
_________________
New to the GMAT Club?
- • Questions: Question Bank | Bunuel's Signature Collection
• Tests: GMAT Club Tests | Forum Quiz
• Guides: Quantitative | Critical Reasoning | Reading Comprehension | Ultimate Quant Guide | All You Need for Quant
• Rules: Quantitative | Verbal
Updated on: 08 Apr 2022, 10:46
Originally posted by Shivamjulka on 06 Apr 2022, 18:37.
Last edited by Shivamjulka on 08 Apr 2022, 10:46, edited 1 time in total.
Last edited by Shivamjulka on 08 Apr 2022, 10:46, edited 1 time in total.
Let the number A=ab=10a+b. As per question stem, B=ba=10b+a. Given Q=10B-A. It works out to Q=100b+10a-10a-b=99b.
In order to find Q, we just need the value of b.
Statement 1-gives value of a(insuff)
Statement b- gives value of b(suff).
Hence answer will be Option B.
Cheers
Posted from my mobile device
In order to find Q, we just need the value of b.
Statement 1-gives value of a(insuff)
Statement b- gives value of b(suff).
Hence answer will be Option B.
Cheers
Posted from my mobile device
GMATWhizTeam
Expert
GMATWhiz Representative
Joined: 07 May 2019
Last visit: 25 Jun 2026
Posts: 3,374
Location: India
GMAT 1: 740 Q50 V41
GMAT 2: 760 Q51 V40
Expert reply
GMAT 2: 760 Q51 V40
Posts: 3,374
Step 1: Analyse Question Stem
In questions involving Numbers and Digits, like this one here, it is good practice to think of the Place value concept.
Many test takers would write A = xy and B = yx; however, if you would like to create expressions / equations, you need to practice writing A = 10x + y and B = 10y + x, which are the numbers expressed in terms of the respective place values of their digits.
We also know that Q = 10B – A. Substituting the values of B and A, we have,
Q = 10 (10y + x) – (10X +y)
= 100y + 10x – 10x – y
= 99y
Therefore, to find the value of Q, we need the value of y, which is the units digit of the number A and also the tens digit of number B.
Step 2: Analyse Statements Independently (And eliminate options) – AD / BCE
Statement 1: The tens digit of A is 7.
This means that x = 7. We have no data about y.
Statement 1 alone is insufficient, answer options A and D can be eliminated.
Statement 2: The tens digit of B is 6.
This means that y = 6. This is sufficient to find out the value of Q, as per our analysis of the question.
Statement 2 alone is sufficient, answer options C and E can be eliminated.
The correct answer option is B.
_________________
Our Upcoming Free Webinars: Register now
Groundbreaking Score Improvement Strategies: Improve by 100+ Points in 40 days | How to Go from 50th to 99th Percentile on GMAT Verbal: 30-Day Master Plan!
Creating a Study Plan: 90 days to 99 percentile: Working Professionals' Perfect Study Plan | The Right Order of Learning | Importance of Error Log
Helpful Quant Strategies: Filling Spaces Method | Avoid Double Counting in P&C | The Art of Not Assuming anything in DS | Number Line Method
Key Verbal Techniques: Plan-Goal Framework in CR | Quantifiers the tiny Game-changers | Tackling Confusing Words in Main Point
In questions involving Numbers and Digits, like this one here, it is good practice to think of the Place value concept.
Many test takers would write A = xy and B = yx; however, if you would like to create expressions / equations, you need to practice writing A = 10x + y and B = 10y + x, which are the numbers expressed in terms of the respective place values of their digits.
We also know that Q = 10B – A. Substituting the values of B and A, we have,
Q = 10 (10y + x) – (10X +y)
= 100y + 10x – 10x – y
= 99y
Therefore, to find the value of Q, we need the value of y, which is the units digit of the number A and also the tens digit of number B.
Step 2: Analyse Statements Independently (And eliminate options) – AD / BCE
Statement 1: The tens digit of A is 7.
This means that x = 7. We have no data about y.
Statement 1 alone is insufficient, answer options A and D can be eliminated.
Statement 2: The tens digit of B is 6.
This means that y = 6. This is sufficient to find out the value of Q, as per our analysis of the question.
Statement 2 alone is sufficient, answer options C and E can be eliminated.
The correct answer option is B.
_________________
GMAT Prep truly Personalized using Technology
Prepare from an application driven course that serves real-time improvement modules along with a well-defined adaptive study plan. Start a free trial to experience it yourself and get access to 25 videos and 300 GMAT styled questions.Our Upcoming Free Webinars: Register now
Groundbreaking Score Improvement Strategies: Improve by 100+ Points in 40 days | How to Go from 50th to 99th Percentile on GMAT Verbal: 30-Day Master Plan!
Creating a Study Plan: 90 days to 99 percentile: Working Professionals' Perfect Study Plan | The Right Order of Learning | Importance of Error Log
Helpful Quant Strategies: Filling Spaces Method | Avoid Double Counting in P&C | The Art of Not Assuming anything in DS | Number Line Method
Key Verbal Techniques: Plan-Goal Framework in CR | Quantifiers the tiny Game-changers | Tackling Confusing Words in Main Point
Automated notice from GMAT Club BumpBot:
A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.
This post was generated automatically.
_________________
A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.
This post was generated automatically.
_________________
Moderators:
Announcements
Tuck at Dartmouth
AI at Dartmouth Tuck: How the School Is Preparing Leaders for the Age of Artificial Intelligence
Inside the courses, research, and hands-on learning defining wise, decisive leadership in an AI-driven world.
Read More
Inside the courses, research, and hands-on learning defining wise, decisive leadership in an AI-driven world.
Read More
Top 5 GMAT Debrief Videos
Success stories and strategies from high-scoring candidates.