The problems in this book are intended mainly for students in junior high school and junior secondary classes, but many will interest students at higher levels. Most of the problems fit quite easily into the regular curriculum, and could be used by both teachers and parents. The book has 11 chapters, all but one of which contain problems and their solutions. Four of the chapters--Search for a Numerical Pattern, Explore and Create, Strip Ornaments, and Things in Plane and Space--are directly applicable to the classroom. Two of them--Games to Play and Cutting, Moving, and Gluing--are mainly for individual enjoyment. Four chapters--Numbers Can Be Fun, Number Chains and Other Curiosities, Problems about This and That, and Tricky Things and Questions--have mixed contents, with parts directly applicable to school when associated with the appropriate topic. In the final chapter, a problem-solving approach is developed, with one or more examples showing the application of each idea to actual problems. Answers and a glossary are included. (MNS)