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

How can a company that has never turned a profit have a multibillion dollar valuation? Why do some start-ups attract large investments while others do not? Aswa

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

The authoritative guide on the National Football League (NFL) salary cap and Collective Bargaining Agreement (CBA). Crunching Numbers: An Inside Look at the Sal

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