diff --git a/Console/Program.cs b/Console/Program.cs
index b3fcdf6a..caee0994 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..9ed3d322 100644
--- a/Tests/UnitTests.cs
+++ b/Tests/UnitTests.cs
@@ -7,7 +7,7 @@ namespace TravisCILab
     public class Math
     {
         [Test]
-        public void Add_Valid()
+        public void Add_Valid_Koranda()
         {
             Assert.AreEqual(3, Program.Add("1", "2"));
             Assert.AreEqual(5, Program.Add("3", "2"));
@@ -15,7 +15,7 @@ public void Add_Valid()
         }
 
         [Test]
-        public void Add_Invalid()
+        public void Add_Invalid_Koranda()
         {
             Assert.Throws<FormatException>(() => Program.Add("1", "a"));
             Assert.Throws<FormatException>(() => Program.Add("a", "1"));
@@ -23,7 +23,7 @@ public void Add_Invalid()
         }
 
         [Test]
-        public void Add_Null()
+        public void Add_Null_Koranda()
         {
             Assert.Throws<ArgumentNullException>(() => Program.Add("1", null));
             Assert.Throws<ArgumentNullException>(() => Program.Add(null, "1"));
@@ -31,5 +31,101 @@ public void Add_Null()
         }
 
         // Implement 3 tests per operation, following a similar pattern as above
+
+        [Test]
+        public void Subtract_Valid_Koranda()
+        {
+            Assert.AreEqual(3, Program.Subtract("5", "2"));
+            Assert.AreEqual(5, Program.Subtract("7", "2"));
+            Assert.AreEqual(12, Program.Subtract("19", "7"));
+        }
+
+        [Test]
+        public void Subtract_Invalid_Koranda()
+        {
+            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_Null_Koranda()
+        {
+            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_Valid_Koranda()
+        {
+            Assert.AreEqual(3, Program.Multiply("1", "3"));
+            Assert.AreEqual(6, Program.Multiply("3", "2"));
+            Assert.AreEqual(35, Program.Multiply("5", "7"));
+        }
+
+        [Test]
+        public void Multiply_Invalid_Koranda()
+        {
+            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_Null_Koranda()
+        {
+            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_Valid_Koranda()
+        {
+            Assert.AreEqual(3, Program.Divide("6", "2"));
+            Assert.AreEqual(5, Program.Divide("10", "2"));
+            Assert.AreEqual(12, Program.Divide("60", "5"));
+        }
+
+        [Test]
+        public void Divide_Invalid_Koranda()
+        {
+            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_Null_Koranda()
+        {
+            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_Valid_Koranda()
+        {
+            Assert.AreEqual(4, Program.Power("2", "2"));
+            Assert.AreEqual(9, Program.Power("3", "2"));
+            Assert.AreEqual(1, Program.Power("1", "7"));
+        }
+
+        [Test]
+        public void Power_Invalid_Koranda()
+        {
+            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_Null_Koranda()
+        {
+            Assert.Throws<ArgumentNullException>(() => Program.Power("1", null));
+            Assert.Throws<ArgumentNullException>(() => Program.Power(null, "1"));
+            Assert.Throws<ArgumentNullException>(() => Program.Power(null, null));
+        }
     }
 }