Koksma gave another classification of the complex numbers into fours categories inspire by Mahler's classification . These are A*-numbers, S*-numbers, U*-numbers and T*-numbers. It is known that A*-numbers are precisely the algebraic numbers. Also, Liouville's numbers are contained in the set of U*-numbers. It is also known that all the set of numbers A*, U*, T* are set of measure zero and hence S*-numbers form a set of full measure. What about an example of f S*-number or T*-number?