using System;

public class Program

{

    public static void Main()

    { 

        Console.WriteLine("請回答以下4題選擇題");

        Console.WriteLine("(1) 3*8 = ? (a)12 (b)24 (c)36 (d) 48");

        string answer = Console.ReadLine();

        if(answer == "b")

        {

                Console.WriteLine("恭喜答對");

        }   

        else

         {

               Console.WriteLine("答錯了!");

         }      

        Console.WriteLine("(2) 7*8 = ? (a)49 (b)26 (c)56 (d) 68");

        string answer2 = Console.ReadLine();

        if(answer2 == "c")

        {

                Console.WriteLine("恭喜答對");

        }   

        else

         {

               Console.WriteLine("答錯了!");

         }      

        Console.WriteLine("(3) 6*7 = ? (a)42 (b)24 (c)36 (d) 48");

        string answer3 = Console.ReadLine();

        if(answer3 == "a")

        {

                Console.WriteLine("恭喜答對");

        }   

        else

         {

               Console.WriteLine("答錯了!");

        }

        Console.WriteLine("(4) 6*8 = ? (a)12 (b)24 (c)36 (d) 48");

        string answer4 = Console.ReadLine();

        if(answer4 == "d")

        {

                Console.WriteLine("恭喜答對");

        }   

        else

         {

               Console.WriteLine("答錯了!");

        }

    }

}