public static void Main()
Random numberGenerator = new Random ();
int num01 = numberGenerator.Next(1,11);
int num02 = numberGenerator.Next(1,11);
Console.WriteLine ("What is " + num01 + " times " + num02 + "?");
int answer = Convert.ToInt32 (Console.ReadLine());
if (answer == num01 * num02)
int responseIndex = numberGenerator.Next(1,4);
Console.WriteLine ("Great Job");
Console.WriteLine ("Keep up the good work");
int diff = Math.Abs (answer = (num01 * num02));
Console.WriteLine("Too Low. Try again.");
Console.WriteLine ("A little bigger");
Console.WriteLine ("Pretty clolse");