diff --git a/functions_to_test.py b/functions_to_test.py
index 330fa02..a95de37 100644
--- a/functions_to_test.py
+++ b/functions_to_test.py
@@ -1,34 +1,71 @@
 # Placeholder functions for Python basics, to be implemented later
+import string
 
 def add_numbers(a, b):
-    pass
+    return a + b
 
 def find_maximum(a, b, c):
-    pass
+    return max(a,b,c)
 
 def is_palindrome(string):
-    pass
+    return string == string[::-1]
+
 
 def count_word_occurrences(text, word):
-    pass
+   if type(text) != str or type(word) != str:
+       raise TypeError("Need to be a string")
+   
+   text = text.lower().split()
+   word = word.lower()
+
+   return text.count(word)
 
 def read_file_lines(filepath):
-    pass
+    with open(filepath, 'r') as f:
+        return f.readlines()
 
 def factorial(n):
-    pass
+    if n == 1 or n == 0:
+       return 1
+    x = 1
+    for i in range(1, n+ 1):
+        x *= i
+    return x
 
 def is_prime(n):
-    pass
+    if n < 0:
+        raise ValueError("Prime not defined for negative numbers")
+    if n <= 1:
+        return False
+    for i in range(2, int(n ** 0.5) + 1):
+        if n % i == 0:
+            return False
+    return True
+
 
 def sort_numbers(numbers):
-    pass
+    numbers = []
+    return numbers.sort(ascii)
+    
 
 def factorial(n):
-    pass
-
+   if n < 0:
+        return ""
+   if type(n) != int:
+       raise TypeError('Invalid input')
+   if n < 0:
+       raise ValueError("Invalid input type")
+   x = 1
+   for i in range(1, n+ 1):
+        x *= i
+   return x
+  
 def fibonacci(n):
-    pass
+    if n == 0:
+        return 0
+    if n == 1:
+        return 1
+    return fibonacci(n - 1) + fibonacci(n - 2)
 
 def tower_of_hanoi(n, source, auxiliary, target):
     
@@ -52,10 +89,13 @@ def tower_of_hanoi(n, source, auxiliary, target):
 
 class Person:
     def __init__(self, name, age):
-        pass
-
+        if type(age) != int or type(name) != str:
+            raise TypeError('Age should only be integer, nae can only be a string')
+        self.name = name
+        self.age = age
+        
 
 if __name__ == "__main__":
     # Placeholder functions for Python basics, to be implemented later
     #to test your functions, you can use the following code
-    print(add_numbers(3, 5)) #e.g
\ No newline at end of file
+    print(add_numbers(3, 5)) #e.g