Which One Doesn’t Belong?

It is the mission of Which One Doesn’t Belong? to provide thought-provoking challenges for both instructors and students on the subject of mathematics. It is impossible to supply solutions because there are many valid approaches to determine which one does not belong in this group.

Ali Kaya


Ali Kaya

This is Ali. Bespectacled and mustachioed father, math blogger, and soccer player. I also do consult for global math and science startups.


edX | Free Educational Tool for Lifelong Learners | Abakcus


edX is a website where you can take interactive courses from some of the world's best universities, colleges, and non-profit organizations. Computer science, engineering, the humanities, statistics, and data analysis…