<p>I’m not entirely sure how hard to get in. You need to show some mathematical ability but don’t need to be a mathematical superstar or anything. What is important is your potential to learn math not what you already know. I believe the application quiz is the most important part of the application. I think something like 40% of applicants were accepted last year. That doesn’t mean much though without knowing the strength of the applicant pool though and unfortunately I don’t think anyone on CC knows that. I don’t think any time is too early to apply as long as you’ve spent enough time on the application problems. If you have other questions I’d be happy to answer them as well.</p>