diff --git a/source/Collection_Data_Types.rst b/source/Collection_Data_Types.rst
index 1ba09e1afc7d33a2d5a5cfc989fe9a854d7954ea..1f7b493ec7495b14cfcb2491219e3356e647c368 100644
--- a/source/Collection_Data_Types.rst
+++ b/source/Collection_Data_Types.rst
@@ -1,3 +1,6 @@
+.. sectnum::
+   :start: 5
+   
 .. _Collection_Data_types:
 
 *********************
diff --git a/source/Control_Flow_Statements.rst b/source/Control_Flow_Statements.rst
index 9b45de8c81f099cd72056f6a8baf46047bbdcbb7..53083a8fc6e84144fd01f1470f713a7090ffdde8 100644
--- a/source/Control_Flow_Statements.rst
+++ b/source/Control_Flow_Statements.rst
@@ -1,3 +1,6 @@
+.. sectnum::
+   :start: 7
+
 .. _Control_Flow_Statements:
 
 
diff --git a/source/Data_Types.rst b/source/Data_Types.rst
index 100eee458510c24c876d6bcfbc091a59253eb3b6..088eedd88c1b715fccddd7d081e73681fdc6274c 100644
--- a/source/Data_Types.rst
+++ b/source/Data_Types.rst
@@ -1,3 +1,6 @@
+.. sectnum::
+   :start: 4
+   
 .. _Data_Types:
 
 **********
diff --git a/source/Dive_into_Functions.rst b/source/Dive_into_Functions.rst
index 34a44461c8b31014cf7db47993abad4b64aabad3..a9d5eb1fa1fbfa3226322951748e72a6bd9c20cf 100644
--- a/source/Dive_into_Functions.rst
+++ b/source/Dive_into_Functions.rst
@@ -1,3 +1,6 @@
+.. sectnum::
+   :start: 8
+
 .. _Dive_into_Functions:
 
 *******************
diff --git a/source/Input_Output.rst b/source/Input_Output.rst
index 9f80dc4bb6d40201541951bc30c67e726dbe97b1..cd8c19f63ff56954cf8a2179173a86540eb7e9c5 100644
--- a/source/Input_Output.rst
+++ b/source/Input_Output.rst
@@ -1,3 +1,6 @@
+.. sectnum::
+   :start: 10
+
 .. _Input_Output:
 
 ****************
diff --git a/source/Modules_and_Packages.rst b/source/Modules_and_Packages.rst
index 5777a21bc66d0992acefb9ce8582ad6cffcf3ec3..5d4224e1318d603546ae5cd7697a40f91d4639df 100644
--- a/source/Modules_and_Packages.rst
+++ b/source/Modules_and_Packages.rst
@@ -1,3 +1,6 @@
+.. sectnum::
+   :start: 9
+
 .. _Modules_and_Packages:
 
 ********************
diff --git a/source/index.rst b/source/index.rst
index e10020472a81e9944ef08bd388f3fe609344230f..76f715f18f537bfdcac830d69ae0cf167b766be1 100644
--- a/source/index.rst
+++ b/source/index.rst
@@ -10,13 +10,9 @@ Contents:
 
 .. toctree::
    :maxdepth: 2
-   :numbered:
    
-   Introduction
-   Variables
    Data_Types
    Collection_Data_Types
-   Logical_Operations
    Control_Flow_Statements
    Dive_into_Functions
    Modules_and_Packages