Instructions Full Game: These are multiple-choice quizzes with four possible answer choices that include all questions in a given set.     
Identify the following individual:

Lived: c. 570 - 497 BCE
Believed the universe was constructed using mathematics and everything could be described with numbers. They established a link between mathematics and music, discovered irrational numbers, and discovered the Platonic Solids.
Heinrich Hertz
René Descartes
Johannes Kepler
Pythagoras