Numbers like pi, e and phi often turn up in unexpected places in science and mathematics. Pascal's triangle and the Fibonacci sequence also seem inexplicably widespread in nature. Then there's the ...

Cell notes are the clutter of the Excel world—they block your view and get in the way of formulas. That's why you should adopt the developer mindset by tucking notes inside your formulas, keeping your ...

Euny Hong is the former supervising editor at Investopedia.com. She is also the author of two critically-acclaimed, published books. Dr. JeFreda R. Brown is a financial consultant, Certified Financial ...