• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• Free Veritas GMAT Class
Experience Lesson 1 Live Free

Available with Beat the GMAT members only code

• 5-Day Free Trial
5-day free, full-access trial TTP Quant

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Award-winning private GMAT tutoring
Register now and save up to \$200

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

## IR Question from GMATPrep

This topic has 2 member replies
Kevinst Junior | Next Rank: 30 Posts
Joined
28 Feb 2012
Posted:
29 messages
Followed by:
6 members
Thanked:
11 times

#### IR Question from GMATPrep

Sun Aug 19, 2012 1:21 pm
Hey,

please look at the IR question posted here:
http://www.beatthegmat.com/graphics-interpretation-t109048.html

According to the solution in GMATPrep, the _beginning_ of the Cambrian Period marks the onset of a new era, eon and period.
While it is obvious that it marks the onset of a new period, it isn't clear to me why it should also mark the onset of a new eon and era. According to the provided graphic, its _end_ marks the onset of a new era and eon, but its beginning still lies within another era and eon.

Any thoughts?

Thank you,
Kevin

Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
vrchen Junior | Next Rank: 30 Posts
Joined
29 Jul 2012
Posted:
11 messages
Test Date:
9/6/2012
Mon Aug 27, 2012 9:23 pm
Hi All,

The answer I selected was Precambrian eon as it marks the end of the Paleozoic era which I equate with the start of another (unnamed?) era. It also marks the beginning of the of the Vendian period.

Any thoughts on this would be greatly appreciated!

vrchen Junior | Next Rank: 30 Posts
Joined
29 Jul 2012
Posted:
11 messages
Test Date:
9/6/2012
Tue Sep 04, 2012 4:14 pm
Hi All,

I just redid the problem and realize the reason the answer is the Cambrian period is because the timeline shows how far in the past each eon/era/period is. Therefore, what looked like the "end" of the Cambrian period is actually the beginning of the period that started ~550 years ago.

I guess I should've taken the hint that the PREcambrian era came before the cambrian period.

Hope this helps!

### Best Conversation Starters

1 Vincen 180 topics
2 lheiannie07 65 topics
3 Roland2rule 49 topics
4 ardz24 40 topics
5 LUANDATO 16 topics
See More Top Beat The GMAT Members...

### Most Active Experts

1 Brent@GMATPrepNow

GMAT Prep Now Teacher

146 posts
2 Rich.C@EMPOWERgma...

EMPOWERgmat

103 posts
3 GMATGuruNY

The Princeton Review Teacher

100 posts
4 EconomistGMATTutor

The Economist GMAT Tutor

92 posts
5 Jay@ManhattanReview

Manhattan Review

79 posts
See More Top Beat The GMAT Experts