The word “number” came from the Latin word “numerus” which mean “to apportion”, to assign, to allot, and to take. Therefore a number is something that measured the size of an allotment. Numeral is any symbol that can represent a number. E.g. five is a number represented by numeral 5 or v. There are various types of numbers – Natural numbers, Integers, Rational, Real and
complex numbers. In this course, we will just define complex numbers; however, other numbers systems will be studied in length by looking at its compositions, the algebra of real numbers properties in operation of real numbers and sets of real numbers.