User blog comment:ThePurplePi/Ask ThePurplePi/@comment-5407503-20150719105928/@comment-24892339-20150719110751

Only 9 actually :P

1. Area of circle

2. Circumference of circle

3. Volume of cone

4. Surface area of cone

5. Volume of cylinder

6. Surface area of cylinder

7. Volume of sphere

8. Surface area of sphere

9. e^(i*pi) = -1

I can't think of more.