Thread:HMcCoy/@comment-25199687-20141003110822

I think that all Challenge Patch pages should be deleted except a few like Master of Trigonometry.

Look at the Algebra II: Logarithms page.

It says:

Algebra II: Logarithms is a Challenge Patch. To get it, you must complete all the Logarithms exercises in the Algebra II Math Mission

That is so obvious. The name itself suggests that you must complete all the Logarithms exercises in the Algebra II Math Mission. 