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Find number abc

If c8368 - a91c1 = a9a1b find number abc. Multiple solutions may exist.

Correct answers: 0

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Tried to read the dictionary in bed last night.
Didn't finish it.
Got up to 'P'.

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Sir Isaac Newton

Born 25 Dec 1642; died 20 Mar 1727 at age 84. English physicist and mathematician who made seminal discoveries in several areas of science, and was the leading scientist of his era. His study of optics included using a prism to show white light could be split into a spectrum of colours. The statement of his three laws of motion are fundamental in the study of mechanics. He was the first to describe the moon as falling (in a circle around the earth) under the same influence of gravity as a falling apple, embodied in his law of universal gravitation. As a mathematician, he devised infinitesimal calculus to make the calculations needed in his studies, which he published in Philosophiae Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy, 1687).«

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