diff --git a/Classes and objects/Special __init__ method/task.md b/Classes and objects/Special __init__ method/task.md
index 0aedd74..3790a61 100644
--- a/Classes and objects/Special __init__ method/task.md	
+++ b/Classes and objects/Special __init__ method/task.md	
@@ -23,13 +23,13 @@ The `__init__()` method may receive arguments for greater flexibility.
 In that case, arguments given to the class instantiation operator are passed 
 on to `__init__()`. For example:
 ```python
-class Complex:
+class ComplexNumber:
     def __init__(self, real_part, imag_part):
         self.r = real_part
         self.i = imag_part
         self.num = complex(self.r, self.i)
 
-x = Complex(3.0, -4.5)  # Instantiating a complex number
+x = ComplexNumber(3.0, -4.5)  # Instantiating a complex number
 x.num
 ```
 ```text
diff --git a/Classes and objects/The self parameter/self_parameter.py b/Classes and objects/The self parameter/self_parameter.py
index 2e5d59e..b87f461 100644
--- a/Classes and objects/The self parameter/self_parameter.py	
+++ b/Classes and objects/The self parameter/self_parameter.py	
@@ -1,5 +1,5 @@
-class Complex:
-    def create(self, real_part, imag_part):
+class ComplexBuilder:
+    def set_parts(self, real_part, imag_part):
         self.r = real_part
         self.i = imag_part
 
@@ -7,8 +7,8 @@ def build(self):
         self.num = complex(self.r, self.i)
 
 
-complex_number = Complex()  # Instantiate a complex number object
-complex_number.create(12, 5)  # Call create method with real_part = 12 and imag_part = 5
+complex_number = ComplexBuilder()  # Instantiate a complex number object
+complex_number.set_parts(12, 5)  # Call set_parts method with real_part = 12 and imag_part = 5
 complex_number.build()  # Build the complex number
 print(complex_number.num)
 
diff --git a/Classes and objects/The self parameter/task-info.yaml b/Classes and objects/The self parameter/task-info.yaml
index f9ce016..e6b9402 100644
--- a/Classes and objects/The self parameter/task-info.yaml	
+++ b/Classes and objects/The self parameter/task-info.yaml	
@@ -3,10 +3,10 @@ files:
   - name: self_parameter.py
     visible: true
     placeholders:
-      - offset: 484
+      - offset: 507
         length: 22
         placeholder_text: "# Update the current attribute by adding the amount to it."
-      - offset: 550
+      - offset: 573
         length: 12
         placeholder_text: ???
   - name: tests/__init__.py
diff --git a/Classes and objects/__str__ vs __repr__/str_and_repr.py b/Classes and objects/__str__ vs __repr__/str_and_repr.py
index c0a2ecc..1d65dd2 100644
--- a/Classes and objects/__str__ vs __repr__/str_and_repr.py	
+++ b/Classes and objects/__str__ vs __repr__/str_and_repr.py	
@@ -1,16 +1,16 @@
-class Complex:
+class ComplexNumber:
     def __init__(self, real_part, imag_part):
         self.real = real_part
         self.img = imag_part
 
     def __repr__(self):
-        return f'Complex({self.real}, {self.img})'
+        return f'ComplexNumber({self.real}, {self.img})'
 
     def __str__(self):
         return f'{self.real} + i{self.img}'
 
 
-x = Complex(2, 5)
+x = ComplexNumber(2, 5)
 print(str(x))
 print(repr(x))
 
diff --git a/Classes and objects/__str__ vs __repr__/task-info.yaml b/Classes and objects/__str__ vs __repr__/task-info.yaml
index 19b7d98..a84975e 100644
--- a/Classes and objects/__str__ vs __repr__/task-info.yaml	
+++ b/Classes and objects/__str__ vs __repr__/task-info.yaml	
@@ -3,10 +3,10 @@ files:
   - name: str_and_repr.py
     visible: true
     placeholders:
-      - offset: 455
+      - offset: 473
         length: 46
         placeholder_text: ???
-      - offset: 541
+      - offset: 559
         length: 45
         placeholder_text: ???
   - name: tests/__init__.py
diff --git a/Classes and objects/__str__ vs __repr__/task.md b/Classes and objects/__str__ vs __repr__/task.md
index 5eb5b0e..704f724 100644
--- a/Classes and objects/__str__ vs __repr__/task.md	
+++ b/Classes and objects/__str__ vs __repr__/task.md	
@@ -24,7 +24,7 @@ defined in the object's class.
 
 Our own defined class should therefore have a `__repr__` if we need detailed information for debugging. 
 Also, if we think it would be useful to have a string representation for users, we should create 
-a `__str__` function. Check out another implementation of the class `Complex` in the code editor. Run the code
+a `__str__` function. Check out another implementation of the class `ComplexNumber` in the code editor. Run the code
 to see what each of the two `print` statements prints.
 
 For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/7139#str__-vs-__repr?utm_source=jba&utm_medium=jba_courses_links).