diff --git a/exercises/01-hello-world/app.py b/exercises/01-hello-world/app.py
index 9e9f9126..dff86958 100644
--- a/exercises/01-hello-world/app.py
+++ b/exercises/01-hello-world/app.py
@@ -1 +1,3 @@
 # On the next line, use Python's print function to say `Hello World` in the console (this exercise is case-sensitive!)
+
+print("Hello World")
diff --git a/exercises/01.1-Access-and-Retrieve/app.py b/exercises/01.1-Access-and-Retrieve/app.py
index c215ca3f..eef3de8d 100644
--- a/exercises/01.1-Access-and-Retrieve/app.py
+++ b/exercises/01.1-Access-and-Retrieve/app.py
@@ -5,4 +5,7 @@
 
 # 2. change the position were 'thursday' is to None
 
-# 3. print that position now here
\ No newline at end of file
+# 3. print that position now here
+
+my_list[4] = 'None'
+print(my_list[4])
\ No newline at end of file
diff --git a/exercises/01.2-Retrieve-items/app.py b/exercises/01.2-Retrieve-items/app.py
index 86a1cbc5..f1a26439 100644
--- a/exercises/01.2-Retrieve-items/app.py
+++ b/exercises/01.2-Retrieve-items/app.py
@@ -2,4 +2,9 @@
 
 # Print in the console the 1st element on the list
 
-# Print in the console the 4th element on the list `spanish_translations`   
\ No newline at end of file
+# Print in the console the 4th element on the list `spanish_translations`   
+
+
+
+print(my_list[0])
+print(my_list[3])
\ No newline at end of file
diff --git a/exercises/01.3-Print-the-last-one/app.py b/exercises/01.3-Print-the-last-one/app.py
index a9a794ce..1cf019d0 100644
--- a/exercises/01.3-Print-the-last-one/app.py
+++ b/exercises/01.3-Print-the-last-one/app.py
@@ -10,5 +10,9 @@ def generate_random_list():
         i += i
     return aux_list
 my_stupid_list = generate_random_list()
+the_last_one = len(my_stupid_list)
+
+print(my_stupid_list)
+print(the_last_one)
 
 # Feel happy to write the code below this comment, good luck!:
diff --git a/exercises/01.4-Add-item-to-list/app.py b/exercises/01.4-Add-item-to-list/app.py
index a0ba2ac1..74b509e3 100644
--- a/exercises/01.4-Add-item-to-list/app.py
+++ b/exercises/01.4-Add-item-to-list/app.py
@@ -1,5 +1,15 @@
 #Remember import random function here:
+import random
+#The magic is here:
 
-my_list = [4,5,734,43,45]
+def generate_random_items():
+    my_list = []
+    adding = random.randint(0, 1)
 
-#The magic is here:
+    for i in range(0, 10(my_list)):
+        my_list.append(adding)
+        i += i
+    return my_list
+
+my_stupid_list = generate_random_items()
+print(my_stupid_list)