This is a straight forward, yet somewhat complex and multi-layered question. It's important you structure your answer to this question. In order to stay on point, and not go off on a tangent, start by explaining to the interviewer how you will answer the question.

"I'd like to start by providing you brief description of the last three projects I managed. I will then outline the skills and abilities I developed from each project and demonstrate how these skills will benefit your company, as well as the projects you have me manage."