What was the name of the mathematical tool John Napier invented?
Napier's Bones
Napier's Hammer
Napier's Axe
Napier's Sword
Answer
Napier's Bones were a calculating device invented by John Napier. They consisted of a set of rods, each of which was marked with a series of numbers. The rods could be used to perform multiplication and division by addition and subtraction. Napier's Bones were an important early calculating device, and they were used by mathematicians and scientists for many years.
Cracking the Code: The John Napier Quiz
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