Задача 2

  Console.Write("Enter a value for x:");
            long x = long.Parse(Console.ReadLine());
            long y = 5;
            long z = 7;

            bool xy = (x % y) == 0;
            bool xz = (x % z) == 0;
            if (xy && xz)
            {
                Console.WriteLine("number is divisible by 5 and 7");
            }
            else
            {
                Console.WriteLine("the number is not divisible by 5 и 7");
            }