Chinese university canteen forces students to solve maths puzzle to use the Wi-fi ‘because we’re all geeks, right?’

An elite Chinese aeronautical university is forcing students who want to use the Wi-fi in the canteen to solve a fiendishly difficult maths equation first, according to the local broadcaster.

Students dining at the Xinyuan Ethnic Restaurant in Nanjing University of Aeronautics and Astronautics had to solve a complex calculus equation and use the first six digits of the answer as the password.