Khan/khan-exercises — pull request #18310 by imranghory (2012-04-02 20:46:40+00:00)
Title: Logarithms 3: Problems using multiple logarithm properties 

A more complex set of logarithm problems where the student has to use multiple logarithm properties to arrive at a solution. Similar in concept to the video "Using Multiple Logarithm Properties to Simplify",