As for finding out your tritype, you have one type from each triad or center: the Gut center (8, 9, 1), the Image center (2, 3, 4), and the Head center (5, 6, 7). And the type you choose tells you how you deal with the core issue of each center. For example, I'm 9-3-5. When I exhaust the strategies of 9, my wing, and my lines of integration, I'll move to 5 or 3; I become a very aloof 9, influenced by the 5; I become very focused on getting the "job" done, so to speak, an all-business, no-nonsense 9...this latter mode of mine made me think for a while that I was 358, and I relate to that archetype a lot. But I didn't know my core type yet. The process of finding your tritype could help you if you're still stumped on your core type, but hopefully that's not the case for you, as it was for me. As a 9, I related to almost everything except 9, go figure.