The University of Waterloo has organized the Canadian Mathematics Competition contests. These are contests designed for every grade from 7 to 12. They also post the past contests on their website. This means that you have access to the past nine years of math contests from them. It is a great source to practice your math skills. Some of the last questions in part C of the contests can be worthy of further exploration. Here is an example of what can be done using the free Geogebra math software.
