Math Problem of the Week

Submitted by david.thacker on

To Eat (the pizza) or to Not Eat (the pizza) Problem

A man is eating pizza. During the first day he eats a half of the pizza. On the second day he eats a third of the remaining part of the pizza. The third day he eats a fourth of what is left, and on the fourth day he eats a fifth of what still remains.

He then stops because the last piece was not fresh. What fraction of the original pizza is left after he eats the portion on the 4th day?

Please email your answer, work and name to your math teacher.