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

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

• 5 Day FREE Trial
Study Smarter, Not Harder

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

• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

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

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

GMATPrep Test 1 - DS Sequence

This topic has 2 member replies
medenica Newbie | Next Rank: 10 Posts
Joined
05 Jan 2007
Posted:
8 messages
Followed by:
1 members

GMATPrep Test 1 - DS Sequence

Thu Jan 11, 2007 10:55 pm
If the terms of a squence are t1, t2, t3, ... , tn, what is the value of n?

1) The sum of the n terms is 3,124
2) The average of the n terms is 4

1 and 2 together are sufficient but can someone actually work out the problem? What are the formulas through which n is derived?

Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
medenica Newbie | Next Rank: 10 Posts
Joined
05 Jan 2007
Posted:
8 messages
Followed by:
1 members
Thu Jan 11, 2007 11:43 pm
Oh wow... how embarrassing. I was really complicating things - it's funny how missing what's being asked for does that...

tnx!

Argen Junior | Next Rank: 30 Posts
Joined
07 Jan 2007
Posted:
24 messages
1
Thu Jan 11, 2007 11:17 pm
2) suggests that 4 = (sum of n terms) / n
1) states that (sum of n terms) = 3124
Therefore n = (sum of n terms) / 4 = 3124 / 4 = 781

Best Conversation Starters

1 lheiannie07 112 topics
2 swerve 64 topics
3 LUANDATO 64 topics
4 ardz24 61 topics
5 AAPL 57 topics
See More Top Beat The GMAT Members...

Most Active Experts

1 Scott@TargetTestPrep

Target Test Prep

227 posts
2 Brent@GMATPrepNow

GMAT Prep Now Teacher

176 posts
3 Jeff@TargetTestPrep

Target Test Prep

168 posts
4 Rich.C@EMPOWERgma...

EMPOWERgmat

138 posts
5 GMATGuruNY

The Princeton Review Teacher

129 posts
See More Top Beat The GMAT Experts