diff --git a/DIRECTORY.md b/DIRECTORY.md
index 4f8a0a7..df4f340 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -65,10 +65,12 @@
 ## Maths
   * [Abs](https://github.com/TheAlgorithms/Ruby/blob/master/maths/abs.rb)
   * [Abs Test](https://github.com/TheAlgorithms/Ruby/blob/master/maths/abs_test.rb)
+  * [Add](https://github.com/TheAlgorithms/Ruby/blob/master/maths/add.rb)
   * [Add Digits](https://github.com/TheAlgorithms/Ruby/blob/master/maths/add_digits.rb)
   * [Aliquot Sum](https://github.com/TheAlgorithms/Ruby/blob/master/maths/aliquot_sum.rb)
   * [Aliquot Sum Test](https://github.com/TheAlgorithms/Ruby/blob/master/maths/aliquot_sum_test.rb)
   * [Average Mean](https://github.com/TheAlgorithms/Ruby/blob/master/maths/average_mean.rb)
+  * [Average Median](https://github.com/TheAlgorithms/Ruby/blob/master/maths/average_median.rb)
   * [Binary To Decimal](https://github.com/TheAlgorithms/Ruby/blob/master/maths/binary_to_decimal.rb)
   * [Ceil](https://github.com/TheAlgorithms/Ruby/blob/master/maths/ceil.rb)
   * [Ceil Test](https://github.com/TheAlgorithms/Ruby/blob/master/maths/ceil_test.rb)