OG 12th Ed. Pg 223. Q 116. I have already seen the OG method of solving this problem, but when I tried to do this on my own before looking at the solution, I identified a sequence which was sort of adding increasing numbers, +1, +2, +3, +4 etc. Can this problem be resolved using this sequence. It's just bothering me bcuz I have identified the sequence and can't figure out how to use it to solve the problem. Thanks!

Can you post the quenstion? Thanks

Yes, here you go. It's in the image attachment bcuz there is a diagram.

The answer is , if the number of cities = N Then the number of dots = N(N-1)/ 2 = 435

Thanks! That's what I was looking for. That's the sequence!

Hi, As 5 citites lead to 10 points or 10 dots.. 30 cities will give 60 dots.. Bfman.. can you post the answer choice too...

Any other way for this problem? - The Beat The GMAT Forum - Expert GMAT Help & MBA Admissions Advice

GMATLiveTeachStarts Nov 22

LIVE ONLINE CLASSES

with Josh Braslow, 20+ years in test prep

Limited seats available

EALiveTeachOnDemandStart anytime

EXECUTIVE ASSESSMENT

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.

Limited cohort · enrollment openTrial includes full course access

GMATOnDemandStart anytime

SELF-PACED MASTERCLASS

Complete access from day one. Study on your schedule.

715+ score guarantee

$0to start then $127/mo