Many of the math problems in this book are from the New York City Interscholastic Math League contests, and Linker and Sultan arrange them in three levels according to difficulty. High school and undergraduate teachers could use the collection as a source of non-traditional problems to challenge brighter students, they say, and high school students and their coaches could use it to prepare for mathematics contests. People who just like math could use it to have fun. Annotation c2016 Ringgold, Inc., Portland, OR (protoview.com)