Smith MathCounts Club,
Here is the link to an updated version of the official 2015-16 MathCounts School Handbook.
This version is better because it includes, not only the answer keys, but also worked-out solutions to every problem. You can teach yourself how to do the problems you don't understand by reading the worked-out solutions.
The solutions start on p65.
- Dr. B
--
Boyd Blackburn
LEAP Math Teacher and MathCounts Coach
Smith Middle School
Chapel Hill, NC