More stimulating mathematics puzzles from bestselling author Paul Nahin How do technicians repair broken communications cables at the bottom of the ocean withou

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Strongest Bites, Longest Legs, Deadliest Claws, Fiercest Horns, Head-to-Head Dino Matchups, and Much More! Every page of this book is bursting with figures, fac

This is Ada. Although she might look like an ordinary little girl, she’s about to change the world. Augusta Ada Byron, better known as Ada Lovelace, is an inq

Are you sharp enough to solve these devious mind-bogglers? These diverting number, geometric, logic, analytical, and story problems--which vary in difficulty fr