At leisure. Collection of entertaining tasks (1959)

The human brain needs constant training no less than the body. Gymnastics for the mind helps to maintain observation, freshness of perception, good memory, and also expand the horizons. The manual contains entertaining tasks, crosswords, tea, cryptograms, quizzes on space, geographical, mathematical, literary and musical themes.
What will happen if the tail of the Galley comet collides with the ground? What river is the name of the pets? In what poem Nekrasov is one of the characters Pushkin? Why are the cranes fly a triangle? How is ice different from ice?
The answers to all tasks are at the end of each chapter. The publication is intended for a wide reader of any age and is ideal for the preparation of competitions, quiz, and intellectual competitions