diff --git a/challenges1-11/challenage-001.py b/challenges1-11/challenage-001.py
index c43dd95..ae039b6 100644
--- a/challenges1-11/challenage-001.py
+++ b/challenges1-11/challenage-001.py
@@ -1,3 +1,7 @@
 print('enter your name')
 name = input("name : ")
-print('your name is {0}'.format(name))
+
+# There are three ways to do this
+#print('your name is {0}'.format(name))
+#print('your name is %s' % (name))
+print(f"your name is {name}")
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diff --git a/challenges1-11/challenage-002.py b/challenges1-11/challenage-002.py
index 87d1e10..9d6bb7a 100644
--- a/challenges1-11/challenage-002.py
+++ b/challenges1-11/challenage-002.py
@@ -2,4 +2,7 @@ print('enter your name')
 name = input("name : ")
 print('enter your surname')
 surname = input("surname : ")
-print('your name is {0} and surname is {1}'.format(name, surname))
+
+#print('your name is {0} and surname is {1}'.format(name, surname))
+#print('your name is %s and surname is %s' % (name, surname))
+print(f"your name is {name} and surname is {surname}")
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diff --git a/challenges1-11/challenage-004.py b/challenges1-11/challenage-004.py
index c72cef8..76fc5e8 100644
--- a/challenges1-11/challenage-004.py
+++ b/challenges1-11/challenage-004.py
@@ -1,3 +1,5 @@
-number_1 = int(input('Calculate two numbers \n please, enter 1st. number : '))
-number_2 = int(input('please, enter 2st. number : '))
+#number_1 = int(input('Calculate two numbers\nplease, enter 1st. number : '))
+#number_2 = int(input('please, enter 2st. number : '))
+number_1 = float(input('Calculate two numbers\nplease, enter 1st. number : '))
+number_2 = float(input('please, enter 2st. number : '))
 print('the result is {0}'.format(number_1+number_2))
diff --git a/challenges1-11/challenage-006.py b/challenges1-11/challenage-006.py
index e69de29..4c1e640 100644
--- a/challenges1-11/challenage-006.py
+++ b/challenges1-11/challenage-006.py
@@ -0,0 +1,4 @@
+all_silces = int(input("how many slices of pizza your have: "))
+eat_silces = int(input("how many slices of pizza have you eaten: "))
+#print('There are %s slices left' % (str(all_silces - eat_silces)))
+print('There are {0} slices left'.format(all_silces - eat_silces))
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