To a nonmathematician, having the letter "i" represent a number that does not quite exist and is "imaginary" can be hard to wrap your head around ... an area of math that deals with complex numbers ... A positive number times itself is a positive number.
The secret lies in a number ... "If we divide 100 by 2.718, which is Euler's number—one of the most famous in mathematical history—we get approximately 37," explains Krapivsky.