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Blaise Pascal

The Calculator

• When he was 8 years old, he and his family moved to Paris. At that time, he was schooled at home in order to focus his instruction.

• When he was 12, he started asking to learn geometry and within a year, he had come up with many theories that took mathematicians decades! He mastered Euclid's Elements that year!

• 4 years later, at just 16, he formulated a basic theorems of geometry - it is now called Pascal's theorem.

• Blaise invented the calculator at the age of 18 in 1641. It was a mechanical calculator capable of addition and subtraction.