Khan/khan-exercises — pull request #4264 by beneater (2011-10-13 01:19:56+00:00)
Title: Interactive number line

This turned out to be rather easy with the new `interactive` utils :)

I modified the existing number line exercise, but perhaps it should be a new exercise since it's asking a different question: it used to ask what number the dot represents. It now gives you the number and you have to put the dot in the right place.