diff --git a/exercises/02-Hello-World/app.py b/exercises/02-Hello-World/app.py
index 801de24..a7b3217 100644
--- a/exercises/02-Hello-World/app.py
+++ b/exercises/02-Hello-World/app.py
@@ -1 +1,2 @@
-# your code here
\ No newline at end of file
+# your code here
+print("Hello World")
\ No newline at end of file
diff --git a/exercises/03-What-is-a-function/app.py b/exercises/03-What-is-a-function/app.py
index 551610b..9fbc220 100755
--- a/exercises/03-What-is-a-function/app.py
+++ b/exercises/03-What-is-a-function/app.py
@@ -1,8 +1,8 @@
 def sum(number1,number2):
     return number1 + number2
 
-total = sum(2,3)
-print(total)
+super_duper = sum(3445324,53454423)
+print(super_duper)
 
 
 
diff --git a/exercises/04-Call-a-function/app.py b/exercises/04-Call-a-function/app.py
index c856d48..5476dd9 100755
--- a/exercises/04-Call-a-function/app.py
+++ b/exercises/04-Call-a-function/app.py
@@ -1,4 +1,11 @@
 def calculate_area(length,edge):
 	return length * edge
 
-# Your code Below this line:
\ No newline at end of file
+# Your code Below this line:
+square_area1=calculate_area(4,4) 
+square_area2=calculate_area(2,2)
+square_area3=calculate_area(5,5)
+
+print(square_area1)
+print(square_area2)
+print(square_area3)
\ No newline at end of file
diff --git a/exercises/05-Defining-vs-Calling-a-function/app.py b/exercises/05-Defining-vs-Calling-a-function/app.py
index 79b86d8..7b562c9 100755
--- a/exercises/05-Defining-vs-Calling-a-function/app.py
+++ b/exercises/05-Defining-vs-Calling-a-function/app.py
@@ -1,5 +1,6 @@
 # Define the function called "multi" that expects 2 parameters:
-
+def multi(a,b):
+    return a*b
 # don't edit anything below this line
 return_value = multi(7,53812212)
 print(return_value)
\ No newline at end of file
diff --git a/exercises/06-lambda-functions/app.py b/exercises/06-lambda-functions/app.py
index e59626e..28b1d34 100755
--- a/exercises/06-lambda-functions/app.py
+++ b/exercises/06-lambda-functions/app.py
@@ -1,2 +1,4 @@
 # your function here
+is_odd = lambda num: num % 2 != 0
 
+print(is_odd(2))
\ No newline at end of file
diff --git a/exercises/07-lambda-function-two/app.py b/exercises/07-lambda-function-two/app.py
index fca265d..225afe9 100755
--- a/exercises/07-lambda-function-two/app.py
+++ b/exercises/07-lambda-function-two/app.py
@@ -1,5 +1,5 @@
 
-
+rapid = lambda name: name[:-1]
 
 # From this line above, plese do not change code below
-print(rapid("bob")) #should print bo
\ No newline at end of file
+print(rapid("jesus")) #should print bo
\ No newline at end of file
diff --git a/exercises/08-Function-that-returns/app.py b/exercises/08-Function-that-returns/app.py
index 44ab611..e0e2271 100755
--- a/exercises/08-Function-that-returns/app.py
+++ b/exercises/08-Function-that-returns/app.py
@@ -4,4 +4,8 @@ def dollar_to_euro(dollar_value):
 def euro_to_yen(euro_value):
 	return euro_value * 124.15
 
-####### ↓ YOUR CODE BELOW ↓ #######
\ No newline at end of file
+####### ↓ YOUR CODE BELOW ↓ #######
+
+enEuros = dollar_to_euro(137)
+enYen=euro_to_yen(enEuros)
+print(enYen)
\ No newline at end of file
diff --git a/exercises/09-Function-parameters/app.py b/exercises/09-Function-parameters/app.py
index 71294e0..b881509 100755
--- a/exercises/09-Function-parameters/app.py
+++ b/exercises/09-Function-parameters/app.py
@@ -1,5 +1,6 @@
 # Your code goes here:
-def render_person(param):
+def render_person(a,b,c,d,e):
+    param = str(a)+" is a "+str(d)+" years old "+str(e)+" born in "+str(b)+" with "+str(c)+" eyes"
     return param
 
 
diff --git a/exercises/10-Array-Methods/app.py b/exercises/10-Array-Methods/app.py
index fdddc23..a0a6972 100755
--- a/exercises/10-Array-Methods/app.py
+++ b/exercises/10-Array-Methods/app.py
@@ -1,5 +1,7 @@
 names = ['John', 'Kenny', 'Tom', 'Bob', 'Dilan']
 ## CREATE YOUR FUNCTION HERE
-
+def sort_names(listado):
+    listado.sort()
+    return listado
 
 print(sort_names(names))