public class WorksheetTester {

    public static void main(String[] args) {

        // TODO, add your application code
        Worksheet y = new Worksheet();
        System.out.println(y);

        y.addProblems(15);
        y.changeTitle("Factoring");
        System.out.println(y);

        y.addProblems(10);
        System.out.println(y);
    }
}