Amc8-Nov13
http://artofproblemsolving.com/wiki/index.php?title=AMC_8_Problems_and_Solutions

Comc-Nov8
https://cms.math.ca/Competitions/COMC/2018/practice.html

Others:Waterloo-Nov21
http://www.cemc.uwaterloo.ca/contests/contests.html

Practise! practise and Practise!