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

two two-digit numbers

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members
Location: India
Thanked: 267 times
GMAT Score:760
by sanju09 » Tue Mar 16, 2010 5:08 am
P, Q, and R are three digits such that the difference between the highest and second highest two-digit numbers formed by using two of P, Q, and R is 5. Also, the smallest two two-digit numbers formed in the same way, differ by 2. If Q > P > R, then what is the value of Q?
(A) 1
(B) 5
(C) 6
(D) 7
(E) 8
The mind is everything. What you think you become. –Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Join the discussion
Source: — Problem Solving |
Legendary Member
Posts: 610
Joined: Fri Jan 15, 2010 12:33 amFollowed by: 2 members
Thanked: 47 times

by kstv » Tue Mar 16, 2010 5:21 am
The number are Q>P>R
10Q+P - (10Q+R ) = 5 = P-R
10R+Q - (10R+P) = 2 = Q-R
Q-R = 7 Q has to 8
Top
Join the discussion
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members
Location: India
Thanked: 267 times
GMAT Score:760

by sanju09 » Tue Mar 16, 2010 5:26 am
kstv wrote:The number are Q>P>R
10Q+P - (10Q+R ) = 5 = P-R
10R+Q - (10R+P) = 2 = Q-R
Q-R = 7 Q has to 8
How do we decide that R cannot be zero?
The mind is everything. What you think you become. –Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Join the discussion
Legendary Member
Posts: 610
Joined: Fri Jan 15, 2010 12:33 amFollowed by: 2 members
Thanked: 47 times

by kstv » Tue Mar 16, 2010 5:34 am
we are talking of 2 digit numbers
Top
Join the discussion
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members
Location: India
Thanked: 267 times
GMAT Score:760

by sanju09 » Tue Mar 16, 2010 5:37 am
kstv wrote:we are talking of 2 digit numbers
right
10R+Q - (10R+P) = 2 = Q-R
RIGHT
The mind is everything. What you think you become. –Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Join the discussion
Senior | Next Rank: 100 Posts
Posts: 33
Joined: Tue Jan 19, 2010 11:15 pm
Location: India
Thanked: 2 times

by [email protected] » Tue Mar 16, 2010 9:58 pm
Since Q is the biggest number, the biggest 2 digit number that can be formed is QQ
Since R is the smallest number, the smallest 2 digit number that can be formed is RR

Therefore,

(10Q+Q) - (10Q+P) = 5
Q-P = 5

(10R+P) - (10R+R) = 2
P-R = 2

1 and 5 are ruled out. 6 cannot be the answer cos that will make P=1 and R = -3. 7 cannot be the answer cos it will make P=2 and R=0.
IMHO Answer is [spoiler](E)8[/spoiler]
Top
Join the discussion
Senior | Next Rank: 100 Posts
Posts: 46
Joined: Sat Feb 27, 2010 2:58 am
Location: GMAT

by GMATSUCKER » Wed Mar 17, 2010 1:56 am
Is this a real GMAT Question ?
GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT, GMAT
What's life without GMAT !!!!!!!!
Top
Join the discussion