diff --git a/X10D/DoubleExtensions.cs b/X10D/DoubleExtensions.cs
index 3fa650b..424a218 100644
--- a/X10D/DoubleExtensions.cs
+++ b/X10D/DoubleExtensions.cs
@@ -45,6 +45,28 @@
             return BitConverter.GetBytes(number);
         }
 
+        /// <summary>
+        /// Determines if the <see cref="Double"/> is even.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is even, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsEven(this double number)
+        {
+            return Math.Abs(number % 2.0) < Double.Epsilon;
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="Double"/> is odd.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is odd, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsOdd(this double number)
+        {
+            return !number.IsEven();
+        }
+
         /// <summary>
         /// Converts an angle from radians to degrees.
         /// </summary>
diff --git a/X10D/Int16Extensions.cs b/X10D/Int16Extensions.cs
index 85914fa..9c598f9 100644
--- a/X10D/Int16Extensions.cs
+++ b/X10D/Int16Extensions.cs
@@ -138,6 +138,50 @@
             return BitConverter.GetBytes(number);
         }
 
+        /// <summary>
+        /// Determines if the <see cref="Int16"/> is even.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is even, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsEven(this short number)
+        {
+            return ((long) number).IsEven();
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="UInt16"/> is even.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is even, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsEven(this ushort number)
+        {
+            return ((ulong) number).IsEven();
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="Int16"/> is odd.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is odd, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsOdd(this short number)
+        {
+            return !number.IsEven();
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="UInt16"/> is odd.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is odd, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsOdd(this ushort number)
+        {
+            return !number.IsEven();
+        }
+
         /// <summary>
         /// Determines if the <see cref="Int16"/> is a prime number.
         /// </summary>
@@ -149,6 +193,17 @@
             return ((long) number).IsPrime();
         }
 
+        /// <summary>
+        /// Determines if the <see cref="Int16"/> is a prime number.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is prime, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsPrime(this ushort number)
+        {
+            return ((ulong) number).IsPrime();
+        }
+
         /// <summary>
         /// Gets an boolean value that represents this integer.
         /// </summary>
diff --git a/X10D/Int32Extensions.cs b/X10D/Int32Extensions.cs
index 42a36b3..571714d 100644
--- a/X10D/Int32Extensions.cs
+++ b/X10D/Int32Extensions.cs
@@ -298,6 +298,50 @@
             return BitConverter.GetBytes(number);
         }
 
+        /// <summary>
+        /// Determines if the <see cref="Int32"/> is even.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is even, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsEven(this int number)
+        {
+            return ((long)number).IsEven();
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="UInt32"/> is even.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is even, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsEven(this uint number)
+        {
+            return ((ulong)number).IsEven();
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="Int32"/> is odd.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is odd, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsOdd(this int number)
+        {
+            return !number.IsEven();
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="UInt32"/> is odd.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is odd, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsOdd(this uint number)
+        {
+            return !number.IsEven();
+        }
+
         /// <summary>
         /// Determines if the <see cref="Int32"/> is a prime number.
         /// </summary>
diff --git a/X10D/Int64Extensions.cs b/X10D/Int64Extensions.cs
index fc605f4..908df84 100644
--- a/X10D/Int64Extensions.cs
+++ b/X10D/Int64Extensions.cs
@@ -137,6 +137,50 @@
             return BitConverter.GetBytes(number);
         }
 
+        /// <summary>
+        /// Determines if the <see cref="Int64"/> is even.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is even, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsEven(this long number)
+        {
+            return Math.Abs(number % 2.0) < Double.Epsilon;
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="UInt64"/> is even.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is even, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsEven(this ulong number)
+        {
+            return Math.Abs(number % 2.0) < Double.Epsilon;
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="Int64"/> is odd.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is odd, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsOdd(this long number)
+        {
+            return !IsEven(number);
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="UInt64"/> is odd.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is odd, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsOdd(this ulong number)
+        {
+            return !IsEven(number);
+        }
+
         /// <summary>
         /// Determines if the <see cref="Int64"/> is a prime number.
         /// </summary>
diff --git a/X10D/README.md b/X10D/README.md
index 991d92c..f185661 100644
--- a/X10D/README.md
+++ b/X10D/README.md
@@ -15,12 +15,12 @@ Below is a list of the number of extension methods written for a given type. Ove
 | `IConvertible` | `X10D` | 4 |
 | `DateTime` | `X10D` | 11 |
 | `EndPoint` | `X10D` | 2 |
-| `double` | `X10D` | 5 |
+| `double` | `X10D` | 7 |
 | `enum` | `X10D` | 2 |
-| `float` | `X10D` | 5 |
+| `float` | `X10D` | 7 |
 | `short` / `ushort` | `X10D` | 11 |
-| `int` / `uint` | `X10D` | 23 |
-| `long` / `ulong` | `X10D` | 11 |
+| `int` / `uint` | `X10D` | 25 |
+| `long` / `ulong` | `X10D` | 13 |
 | `IList<T>` | `X10D` | 2 |
 | `Random` | `X10D` | 2 |
 | `string` / `SecureString` | `X10D` | 8 |
diff --git a/X10D/SingleExtensions.cs b/X10D/SingleExtensions.cs
index f3b65f6..9a27c85 100644
--- a/X10D/SingleExtensions.cs
+++ b/X10D/SingleExtensions.cs
@@ -45,6 +45,28 @@
             return BitConverter.GetBytes(number);
         }
 
+        /// <summary>
+        /// Determines if the <see cref="Single"/> is even.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is even, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsEven(this float number)
+        {
+            return ((double) number).IsEven();
+        }
+
+        /// <summary>
+        /// Determines if the <see cref="Single"/> is odd.
+        /// </summary>
+        /// <param name="number">The number.</param>
+        /// <returns>Returns <see langword="true"/> if <paramref name="number"/> is odd, <see langword="false"/>
+        /// otherwise.</returns>
+        public static bool IsOdd(this float number)
+        {
+            return !number.IsEven();
+        }
+
         /// <summary>
         /// Converts an angle from radians to degrees.
         /// </summary>