BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

Counting Problem

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 165
Joined: Wed Mar 24, 2010 8:02 amFollowed by: 1 member
Thanked: 2 times

by HPengineer » Tue Aug 17, 2010 7:40 am
kvcpk,

How would your formula work for say finding 5 for the range from 500 to 10,000?

Would you start your first set still as (5-0)+ 1 = 6 +5 +4 +3 +2 +1? What if some of these values are below 500? how do we account?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Legendary Member
Posts: 1893
Joined: Sun May 30, 2010 11:48 pmFollowed by: 7 members
Thanked: 215 times

by kvcpk » Tue Aug 17, 2010 7:51 am
HPengineer wrote:kvcpk,

How would your formula work for say finding 5 for the range from 500 to 10,000?

Would you start your first set still as (5-0)+ 1 = 6 +5 +4 +3 +2 +1? What if some of these values are below 500? how do we account?
Assuming 500 is not included,

The problem you are asking for is same as finding sum of 5 for the range 1000 to 10000.
Because, there will be no value between 501 and 999, that has a sum of digits as 5.

So my first range header will be 1.

Hope this helps!!
"Once you start working on something,
don't be afraid of failure and don't abandon it.
People who work sincerely are the happiest."
Chanakya quotes (Indian politician, strategist and writer, 350 BC-275BC)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 165
Joined: Wed Mar 24, 2010 8:02 amFollowed by: 1 member
Thanked: 2 times

by HPengineer » Tue Aug 17, 2010 7:54 am
ok lets say 500 was included... it should still work cause header would be (5-5) +1 = 1

there would only be one value from 500 to 999 thats adds up to 5...

nice solution...
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply