This is an unofficial Project Euler app for Android phones and tablets that lets you access all the problems and puzzles on the ProjectEuler.net website, even if you don't have Internet access available.
What is Project Euler?
Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems. For more information on Project Euler, visit http://projecteuler.net/about