Which degree would be best to get as an undergrad, so that when it comes time to decide whether or not to take a career in it or to get a masters, it can be used to get multiple masters or multiple phds.
No one major qualifies you for grad school in everything. What fields were you considering getting a masters/PhD in? Remember that you won't do more than one PhD; most schools won't consider admitting you for a second.
Is that the same school whom won't admit you for a second? or is for all schools? I'm kinda in the mix of everything right now, I'm not sure exactly what I want to do. I would like to get a mathematics then use that as a tool for entrance to ms degrees of my choice. Maybe somewhere in physics, engineering of some sort. It would be nice to have a complete understanding of most of the sciences.