<p>British universities tend to allow (or even require) earlier specialization by undergraduates than United States universities. If you are a math major at Oxford or Cambridge (both good places to study math), you will be doing mostly math most of the time. A math major at Yale, Harvard, Princeton, etc. will still be taking quite a few non-math courses at a very challenging level, and will have the opportunity to take challenging classics courses from great classical scholars.</p>