Brainbuster

This is my new brainbuster question section. I don't know how long this question will last, but if you get it right, your name will be put on a Hall of Fame Brainbuster's List. Next, I will not accept any guesses. If you would like to answer, please send me an e-mail with your name, answer, and what page you found this information on. Also, please specify what book you are using. (Example-Ender's Game-US paperback.)

The brainbuster is:

How old was Bean when he read Euclid?