I Can Read Your Mind

I saw this on a David Blaine special, and I think I've figured out how to do it, so I want to try it out on everyone.

I want you to think of a number between 1 and 50. It can be any number between 1 and 50, but both digits must be different odd numbers.

Have you thought of a number? Okay, concentrate on that number.

I've got it. I know what number you're thinking of. I'll post it in the comments section.