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.

★★★★★5.0563 reviews
Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep
NEWSWEEK READERS’ CHOICE AWARDS 2026

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

GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 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
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

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

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Very intresting CR - Must be true

Expert replies
by AIM GMAT » Mon Apr 18, 2011 8:37 am
No mathematician today would flatly refuse to accept the results of an enormous computation as an adequate demonstration of the truth of a theorem. In 1976, however, this was not the case. Some mathematicians at that time refused to accept the results of a complex computer demonstration of a very simple mapping theorem. Although some mathematicians still hold a strong belief that a simple theorem ought to have a short, simple proof, in fact, some simple theorems have required enormous proofs.

If all of the statements in the passage are true, which one of the following must also be true?

(A) Today, some mathematicians who believe that a simple theorem ought to have a simple proof would consider accepting the results of an enormous computation as a demonstration of the truth of a theorem.
(B) Some individuals who believe that a simple theorem ought to have a simple proof are not mathematicians.
(C) Today, some individuals who refuse to accept the results of an enormous computation as a demonstration of the truth of a theorem believe that a simple theorem ought to have a simple proof.
(D) Some individuals who do not believe that a simple theorem ought to have a simple proof would not be willing to accept the results of an enormous computation as proof of a complex theorem.
(E) Some nonmathematicians do not believe that a simple theorem ought to have a simple proof.
Thanks & Regards,
AIM GMAT
Join the discussion
Source: — Critical Reasoning |

by force5 » Mon Apr 18, 2011 1:17 pm
@ Aim where did u get this CR from?? i needed a cup of coffee after this.....

Tried my best and was left with A

important sentence is
No mathematician today would flatly refuse to accept the results of an enormous computation as an adequate demonstration of the truth of a theorem.
Hence A
Join the discussion

by Brian@VeritasPrep » Mon Apr 18, 2011 4:52 pm
Wow - yeah, great question here! This is as involved (if not more so) than anything I think you'd see on the GMAT and I think it may rely more on formal logic than a typical GMAT question, too, so I'd be surprised if this one didn't come from the LSAT.

The way I looked at this one, the premises ONLY tell us about mathematicians; we don't explicitly know anything about anyone else. So unless "some individuals" in B, C, and D include mathematicians as part of those groups, they won't work...they're already a little suspect to me. And E is out - we don't know anything about them.

B also focuses (in the second half) on non-mathematicians, so we don't know about them. Same with D.

C, at least to me, is a little tricky, but again it goes back to the fact that we don't know anything about non-mathematicians. And since "some who refuse to accept the results of an enormous computation" rules out (based on sentence 1 of the stimulus) all mathematicians, we don't know anything about anyone else and we can't prove C.

A is left, and it's a pretty nice paraphrase of the first sentence of the paragraph. We know that "no mathematician would not accept..." the complex results, so it's safe to say that some mathematicians who have a certain belief would consider accepting those results.
Brian Galvin
GMAT Instructor
Chief Academic Officer
Veritas Prep

Looking for GMAT practice questions? Try out the Veritas Prep Question Bank. Learn More.
Join the discussion

by havok » Mon Apr 18, 2011 6:06 pm
Great, I got A as well - although I thought my deeming 'non-mathematicians' as false answers felt odd.
Join the discussion

by ldoolitt » Mon Apr 18, 2011 6:21 pm
Interestingly enough this is a real happening; it's in reference to the computer proof of the 4 color theorem that some people from UI put forth in the 1970s. Real life knowledge comes in handy!

Oh but yeah I agree that A is the only answer that makes any sense really.
Join the discussion

by AIM GMAT » Mon Apr 18, 2011 10:41 pm
Thanks Brian , yes you are absolutely right about the source , its from LSAT . I found this question really very intresting , its like solving a puzzle .


@force - You got it right buddy .


You guys nailed it :)
Thanks & Regards,
AIM GMAT
Join the discussion

by Testluv » Mon Apr 18, 2011 11:07 pm
As Brian says, (A) is a nice rephrase of the first sentence of the passage. In an inference question if you see a choice that restates a part of the passage it is automatically correct.

Don't forget that one can use the Kaplan denial test in inference questions:

If (A) were false, would any part of the passage be contradicted? Well, if (A) were false--if, today, some mathematicians refused to accept computer-based proofs--then the first sentence of the passage would become false. Thus, (A) must be true, and actually if you verified (A) was correct using this test, you wouldn't actually have to look at the other choices.
Kaplan Teacher in Toronto
Join the discussion

by rohu27 » Tue Apr 19, 2011 11:00 am
Nice one AIM,woke me up completely from my semi sleep state. Bingo, im up for more time now ;)
btw i did end up wth A.
Join the discussion