"The challenge is if certain types of people are doing something, it's difficult for other people to break into it," said Po-Shen Loh, the head coach of last year's winning U.S. Math Olympiad team.

There is nothing like trying to break something down into simpler terms for others to help you understand it better than you did before.

By doing this, I break down something that seems far-off (a beautiful big house to retire in and for my children and grandchildren to enjoy) into smaller pieces that I can do right now.