diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 00000000..afd0e8a7
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,10 @@
+language: csharp
+solution: TravisCI.sln
+branches:
+  only:
+  - master
+install:
+  - nuget restore TravisCI.sln
+script:
+  - msbuild /p:Configuration=Release TravisCI.sln
+  - mono ./packages/NUnit.ConsoleRunner.*/tools/nunit3-console.exe ./Tests/bin/Release/Tests.dll
\ No newline at end of file
diff --git a/Console/Program.cs b/Console/Program.cs
index b3fcdf6a..f0c618ae 100644
--- a/Console/Program.cs
+++ b/Console/Program.cs
@@ -84,7 +84,7 @@ public static double Divide(string x, string y)
         // Implement this method following a similar pattern as above
         public static double Power(string x, string y)
         {
-            throw new NotImplementedException();
+            return Math.Pow(double.Parse(x), double.Parse(y));
         }
     }
 
diff --git a/Tests/UnitTests.cs b/Tests/UnitTests.cs
index 84cde036..de518b41 100644
--- a/Tests/UnitTests.cs
+++ b/Tests/UnitTests.cs
@@ -30,6 +30,114 @@ public void Add_Null()
             Assert.Throws<ArgumentNullException>(() => Program.Add(null, null));
         }
 
+        /// <summary>
+        /// //////////////////
+        /// </summary>
+
+        [Test]
+        public void Subtract_ValidAggarwal()
+        {
+            Assert.AreEqual(1, Program.Subtract("2", "1"));
+            Assert.AreEqual(5, Program.Subtract("10", "5"));
+            Assert.AreEqual(12, Program.Subtract("20", "8"));
+        }
+
+        [Test]
+        public void Subtract_InvalidAggarwal()
+        {
+            Assert.Throws<FormatException>(() => Program.Subtract("1", "a"));
+            Assert.Throws<FormatException>(() => Program.Subtract("a", "1"));
+            Assert.Throws<FormatException>(() => Program.Subtract("a", "a"));
+        }
+
+        [Test]
+        public void Subtract_NullAggarwal()
+        {
+            Assert.Throws<ArgumentNullException>(() => Program.Subtract("1", null));
+            Assert.Throws<ArgumentNullException>(() => Program.Subtract(null, "1"));
+            Assert.Throws<ArgumentNullException>(() => Program.Subtract(null, null));
+        }
+
+        ////////
+        ///
+
+        [Test]
+        public void Multiply_ValidAggarwal ()
+        {
+            Assert.AreEqual(2, Program.Multiply("1", "2"));
+            Assert.AreEqual(6, Program.Multiply("3", "2"));
+            Assert.AreEqual(35, Program.Multiply("5", "7"));
+        }
+
+        [Test]
+        public void Multiply_InvalidAggarwal()
+        {
+            Assert.Throws<FormatException>(() => Program.Multiply("1", "a"));
+            Assert.Throws<FormatException>(() => Program.Multiply("a", "1"));
+            Assert.Throws<FormatException>(() => Program.Multiply("a", "a"));
+        }
+
+        [Test]
+        public void Multiply_NullAggarwal()
+        {
+            Assert.Throws<ArgumentNullException>(() => Program.Multiply("1", null));
+            Assert.Throws<ArgumentNullException>(() => Program.Multiply(null, "1"));
+            Assert.Throws<ArgumentNullException>(() => Program.Multiply(null, null));
+        }
+
+        ///////
+        ///
+
+        [Test]
+        public void Divide_ValidAggarwal()
+        {
+            Assert.AreEqual(1, Program.Divide("2", "2"));
+            Assert.AreEqual(4, Program.Divide("8", "2"));
+            Assert.AreEqual(3, Program.Divide("21", "7"));
+        }
+
+        [Test]
+        public void Divide_InvalidAggarwal ()
+        {
+            Assert.Throws<FormatException>(() => Program.Divide("1", "a"));
+            Assert.Throws<FormatException>(() => Program.Divide("a", "1"));
+            Assert.Throws<FormatException>(() => Program.Divide("a", "a"));
+        }
+
+        [Test]
+        public void Divide_NullAggarwal()
+        {
+            Assert.Throws<ArgumentNullException>(() => Program.Divide("1", null));
+            Assert.Throws<ArgumentNullException>(() => Program.Divide(null, "1"));
+            Assert.Throws<ArgumentNullException>(() => Program.Divide(null, null));
+        }
+
+        ////////
+        ///
+
+        [Test]
+        public void Power_ValidAggarwal()
+        {
+            Assert.AreEqual(1, Program.Power("1", "2"));
+            Assert.AreEqual(9, Program.Power("3", "2"));
+            Assert.AreEqual(125, Program.Power("5", "3"));
+        }
+
+        [Test]
+        public void Power_InvalidAggarwal()
+        {
+            Assert.Throws<FormatException>(() => Program.Power("1", "a"));
+            Assert.Throws<FormatException>(() => Program.Power("a", "1"));
+            Assert.Throws<FormatException>(() => Program.Power("a", "a"));
+        }
+
+        [Test]
+        public void Power_NullAggarwal()
+        {
+            Assert.Throws<ArgumentNullException>(() => Program.Power("1", null));
+            Assert.Throws<ArgumentNullException>(() => Program.Power(null, "1"));
+            Assert.Throws<ArgumentNullException>(() => Program.Power(null, null));
+        }
         // Implement 3 tests per operation, following a similar pattern as above
     }
 }
diff --git a/TravisCI.sln b/TravisCI.sln
index c3edf276..5876a4fd 100644
--- a/TravisCI.sln
+++ b/TravisCI.sln
@@ -1,12 +1,17 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.27130.2036
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30907.101
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Console", "Console\Console.csproj", "{C5964EEF-DA27-4C98-B4D0-7F27767FE870}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Tests", "Tests\Tests.csproj", "{C3F293D9-3D79-4280-9E67-9E51A00E94F3}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{D9CFF8B8-3F9A-4C44-8991-D603137BBC7D}"
+	ProjectSection(SolutionItems) = preProject
+		.travis.yml = .travis.yml
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU