Henry E. Dudeney is rightfully considered a classic of entertaining mathematics. Many of his tasks, giving rise to extensive literature and causing numerous imitations, entered its golden fund. The proposed book collects 520 problems and puzzles of Dudeny on arithmetic, algebra, geometry, cutting and figure composition. The reader will meet with the permanent heroes of Dudeny - the Crackham family, Professor Rackbrain and others. The book will please all lovers of entertaining mathematics.