public void Problem3Test2()
        {
            var result = Leonhard1to10Exercises.Problem3(600851475143);

            Assert.AreEqual(6857, result);
        }
        public void Problem3Test()
        {
            var result = Leonhard1to10Exercises.Problem3(120);

            Assert.AreEqual(7, result);
        }
        public void Problem2Test()
        {
            var actual = Leonhard1to10Exercises.Problem2(77);

            Assert.AreEqual(44, actual);
        }
        public void Problem2Test2()
        {
            var actual = Leonhard1to10Exercises.Problem2(4000000);

            Assert.AreEqual(4613732, actual);
        }
        public void Problem1Test2()
        {
            var result = Leonhard1to10Exercises.Problem1(1000);

            Assert.AreEqual(233168, result);
        }