Final answer:
John Napier, a Scottish mathematician, invented Napier's Bones. He was born in 1550.
Step-by-step explanation:
Napier's Bones were invented by John Napier, a Scottish mathematician, physicist, and astronomer. He was born in the year 1550 in Merchiston Castle, Edinburgh, Scotland. Napier's Bones are a calculating device used to perform multiplication and division, and they were a precursor to the modern-day slide rule. They consisted of rods or bones inscribed with multiplication tables that could be arranged and manipulated to perform calculations.