Khan/khan-exercises — pull request #7421 by yuqiaoyan (2011-12-01 03:50:57+00:00)
Title: Created a counting problem

Hi,

I created a combination problem for counting_3. This is my first problem.

Can you please provide feedback?

There are a few questions I have around problem design:

1. What is the mathematical maturity do you expect from your users? (i.e. how explicit should the hints be)
2. How long should hints be?
3. Do you capture the difficulty level of a problem?

Thanks,
Bonnie