This collection contains about 250 problems inphysics set for boys and girls from Moscow schoolsparticipating in physics olympiads from 1968 to1985. The most interesting and original problemsfrom these examinations have been included togetherwith their solutions.Intended for schoolchildren and teachers of physics,this book can also be used for preparation to entranceexaminations to the higher educational instituteswhere an advanced knowledge of physics is required.