Books like A programmed introduction to number systems by Irving Drooyan

In his clear, informal, engaging style, Isaac Asimov explains historic brainteasers and numerical oddities in the fascinating universe of numbers. From man's first act of counting to higher mathematics, from the smallest living creature to the dazzling reaches of outer space, Asimov is a master at "explaining complex material better than any other living person." (The New York Times) You'll learn: HOW to make a trillion seem small; WHY imaginary numbers are real; THE real size of the universe - in photons; WHY the zero isn't "good for nothing;" AND many other marvelous discoveries, in ASIMOV ON NUMBERS Essays: Nothing Counts One, Ten, Buckle My Shoe Exclamation Point! T-formation Varieties of the Infinite A Piece of Pi Tools of the Trade The Imaginary That Isn't Forget It! Pre-fixing It Up The Days of Our Years Begin at the Beginning That's about the Size of It The Proton Reckoner Water, Water, Everywhere Up and down the Earth The Isles of Earth

The Higher Arithmetic presents number theory concepts and theorems through clear, accessible exposition, with new material on Fermat’s Last Theorem, computational methods, and primality testing.