The Red Book of Mathematical Problems

Rating:
Summary: A good collection at a best $ per problem ratio !
Review: A collection of tough 100 problems of many math branches (unsorted accordingly), for undergraduates training towards competitions. Has the advantage of suggesting hints, in additions to the full solutions. A short "Sources" section contains sources , generalizations and alternative solutions for some of the problems. This book is a twin-book to "the green book of mathematical problems" by the same authors. A very good bargain !