The Purplemath Forums

Is there a smart way to solve this..?

I can see a brute force type of way.... by looking at the number of 6's from 1-100, then 101 to 200 etc... and special cases for 601-700 etc... but it seems very long, tedius and prone to error?

Thanks for any ideas.

Thanks!

That was my guess, but I was hoping for a motrin free method.... Patterns makes sense and its a good exercise.

Mahalo,

Tory

One of my classmates got the same answer as presented by Dr. Andrew.... using the pattern method: how many 6's from 1-100, how many from 1000-1999 etc... and making use of the special case where the first number is 2. When I tried Dr. Andrews method for the text question: How many zeros from 1 to 1,...