The present book is based on the view that cognitive skills are best
acquired by solving challenging, non-standard probability problems. Many
puzzles and problems presented here are either new within a problem
solving context (although as topics in fundamental research they are of
course long known) or are variations of classical problems which follow
directly from elementary concepts. A small number of particularly
instructive problems is taken from previous sources which in this case
are generally given. This book contains far more problems of a
statistical nature than the competition. It will become a handy resource
for professors looking for problems to assign for a course, and will be
of interest to undergraduate math students, as well as a more general
audience of amateur scientists.