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
Vote for Target Test Prep, Newsweek Readers’ Choice Awards 2026
NEWSWEEK READERS’ CHOICE 2026

BIG NEWS! Target Test Prep has been nominated, and they’d love your vote!

TTP has worked incredibly hard to build the best test prep experience possible, and winning Newsweek’s 2026 Readers’ Choice Award for Best Test Prep would mean a lot to them. If TTP has helped you, they’d be incredibly grateful for your vote. You can vote once each day through September 9.

Vote for TTP
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & 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.

GMAT Prep / Number Properties

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
Master | Next Rank: 500 Posts
Posts: 119
Joined: Sun Nov 30, 2008 2:47 am
Thanked: 11 times

by Zipper » Wed Dec 03, 2008 2:10 pm
1. When x is divided by 2, the remainder is 1 (so far we know that we'll always have a remainder); and when x is divided by 3, the reminder is 0.

this leaves us only with numbers with reminder 3.
(visualizing for better understanding though during the test this is not worth the time in most cases: 9/6=reminder3; 15/6=reminder3; 21/6=reminder3 etc.;
you can't have 6,12,18 since divided by 2 you should have reminder 1)

2. When x is divided by 12, the reminder is 3.

even easier to calculate, always reminder 3.

hence, D
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3380
Joined: Mon Mar 03, 2008 1:20 amFollowed by: 1535 members
Thanked: 2256 times
GMAT Score:800

by lunarpower » Fri Dec 05, 2008 3:34 am
this is also one of those problems where 'decoding' the statements by translating them into numbers works wonders: just sort through numbers by trial and error, and find the list of numbers that works for each statement.

(1)
the numbers that work for this statement are 3, 9, 15, 21, etc. adding 6 each time.

(2)
the numbers that work for this statement are 3, 15, 27, 39, etc. adding 12 each time.

if you make these lists - which hardly takes a prohibitive amount of time** - you'll find that either statement is sufficient on its own, so, (d).

incidentally, you should at least be able to translate '1 is the remainder upon dividing X by 2' into 'X is odd', IMMEDIATELY.

--

as i said here,
if you have a problem about REMAINDERS, you should view that problem as an opportunity for PATTERN RECOGNITION.
there are lots of topics that lead to recognition of common patterns - i.e., remainders aren't the only topic of such problems - but, in remainder problems, CLEAR patterns tend to emerge QUICKLY if you start testing numbers in some sort of systematic manner.

--

finally, i feel compelled to respond to the following:
visualizing for better understanding though during the test this is not worth the time in most cases:
kill that noise.

if you find a viable solution method, you should embark on it IMMEDIATELY, unless you KNOW it's going to take an absolutely ridiculous amount of time.
and you can rest assured that won't be the case here, because, as noted above, patterns on remainder problems tend to emerge early and often.

the last thing that you ever want to do on this test is sit there, staring dumbfounded at a problem, even though you have a potential solution method in mind. that will kill you.
if you think of a method involving plugging / listing, just start doing it. if it's going to be ridiculously time-consuming, you'll figure that out fast enough to abort it anyway - no harm done.
indecision is the WORST trait you can have on this test, bar none.
Ron has been teaching various standardized tests for 20 years.

--

Pueden hacerle preguntas a Ron en castellano
Potete chiedere domande a Ron in italiano
On peut poser des questions à Ron en français
Voit esittää kysymyksiä Ron:lle myös suomeksi

--

Quand on se sent bien dans un vêtement, tout peut arriver. Un bon vêtement, c'est un passeport pour le bonheur.

Yves Saint-Laurent

--

Learn more about ron
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 119
Joined: Sun Nov 30, 2008 2:47 am
Thanked: 11 times

by Zipper » Fri Dec 05, 2008 4:36 am
I only mentioned it for better understanding for all other viewers (the OP of the thread and all other who might be interested in the answer). Just tried to do my best with the answer and not have posts after mine like "i still don't get it"; "can you explain it a a bit more" or something in those lines. I am at the beginning of my gmat preparation and I don't know 1/100 (probably even more) of the things you do. For instance I did not know that I could view reminders as an opportunity for pattern recognition. Hopefully, in my stay here I will pick up a lot of these tips/tricks to help me when I have to take the gmat. However I disagree with you in this particular case that I should "kill this noise". This "noise" in my opinion helps visualize the problems/answers and helps understanding what the guy was trying to say. I got to the answer without going trough this visualizations and with a lot of certainty I might add. I was so certain that I got it right (this doesn't mean I did, this means I was quite satisfied with the answer that I got, that I am sure that this visualization won't do anything but waste time for me). Of course it checks if the answer is right but if i start checking/rechecking everything that I am certain of.....

I see this is getting quite long and there is no point in that, coz all I am doing right now is wasting my time, wasting your time and the time of everybody that is going to read this post. I hope you understand what I meant. I didn't try to tell anybody "you don't have to visualize things on the GMAT test!", all I tried to say is "If you are quite certain of an answer in most cases It's a waste of time rechecking it". This is clearly my opinion and I am not trying to influence anybody with it. However, I do think this kind of "noise" helps a lot of people to better understand a certain solution and that's what it's all about.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3380
Joined: Mon Mar 03, 2008 1:20 amFollowed by: 1535 members
Thanked: 2256 times
GMAT Score:800

by lunarpower » Sat Dec 06, 2008 12:18 am
Zipper wrote:I hope you understand what I meant. I didn't try to tell anybody "you don't have to visualize things on the GMAT test!", all I tried to say is "If you are quite certain of an answer in most cases It's a waste of time rechecking it".
ok, now i understand. i had actually taken your post to mean precisely what you hadn't meant it to: that "visualization" (in this case meaning "making lists of examples"), in most cases, is a waste of time.

it was the words "in most cases" that got me - especially because nowhere in your post did you mention anything about certainty or re-checking answers.

thanks for the clarification; we're on the same page.
Ron has been teaching various standardized tests for 20 years.

--

Pueden hacerle preguntas a Ron en castellano
Potete chiedere domande a Ron in italiano
On peut poser des questions à Ron en français
Voit esittää kysymyksiä Ron:lle myös suomeksi

--

Quand on se sent bien dans un vêtement, tout peut arriver. Un bon vêtement, c'est un passeport pour le bonheur.

Yves Saint-Laurent

--

Learn more about ron
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1