diff --git a/Chapter 2 - PS/02_problem2.py b/Chapter 2 - PS/02_problem2.py
index 3b9c128..0786c37 100644
--- a/Chapter 2 - PS/02_problem2.py	
+++ b/Chapter 2 - PS/02_problem2.py	
@@ -2,4 +2,7 @@
 
 b = 5
 
-print("Remainder when a is divided by b is", a % b)
\ No newline at end of file
+print("Remainder when a is divided by b is", a % b)
+name="fayyaz"
+age= 20
+print("My name is", name, "and I am", age, "years old.")
\ No newline at end of file
diff --git a/Chapter 2 - PS/03_problem3.py b/Chapter 2 - PS/03_problem3.py
index 1616c01..78ae588 100644
--- a/Chapter 2 - PS/03_problem3.py	
+++ b/Chapter 2 - PS/03_problem3.py	
@@ -1,2 +1,4 @@
 a = input("Enter the value of a: ")
-print(type(a))
\ No newline at end of file
+print(type(a))
+b=input("add number 2: ")
+print(type(b))
\ No newline at end of file
diff --git a/Chapter 2 - PS/04_problem4.py b/Chapter 2 - PS/04_problem4.py
index 4ef443f..688b189 100644
--- a/Chapter 2 - PS/04_problem4.py	
+++ b/Chapter 2 - PS/04_problem4.py	
@@ -1,4 +1,8 @@
 a = int(input("Enter number 1: "))
 b = int(input("Enter number 2: "))
-
-print("a is greater than b is", a>b)
\ No newline at end of file
+c= a+b
+print("The sum of a and b is", c)
+if a>b:
+    print("a is greater than b")
+if a<b:
+    print("b is greater than a")
\ No newline at end of file
diff --git a/Chapter 2 - PS/05_problem5.py b/Chapter 2 - PS/05_problem5.py
index 3594d74..2abc247 100644
--- a/Chapter 2 - PS/05_problem5.py	
+++ b/Chapter 2 - PS/05_problem5.py	
@@ -1,5 +1,6 @@
 a = int(input("Enter number 1: "))
 b = int(input("Enter number 2: "))
-
+c=a+b
+print("avarage of these two number is", (c)/2)
 
 print("The average of these two number is", (a+b)/2)
\ No newline at end of file
diff --git a/Chapter 2 - PS/06_problem6.py b/Chapter 2 - PS/06_problem6.py
index e6bd878..e958150 100644
--- a/Chapter 2 - PS/06_problem6.py	
+++ b/Chapter 2 - PS/06_problem6.py	
@@ -1,6 +1,7 @@
 a = int(input("Enter your number: ")) 
 
-
+b=int(input("Enter your number: "))
+print("b^a is", b**a)
 print("The square of the number is", a**2)
 print("The square of the number is", a*a)
 # print("The square of the number is", a^2) # Incorrect for finding square of a number in Python
\ No newline at end of file
diff --git a/Chapter 3 - PS/03_problem3.py b/Chapter 3 - PS/03_problem3.py
index 12bb4da..5977efe 100644
--- a/Chapter 3 - PS/03_problem3.py	
+++ b/Chapter 3 - PS/03_problem3.py	
@@ -1,3 +1,3 @@
 name = "Harry is a good  boy and  "
 
-print(name.find("  "))
\ No newline at end of file
+print(name.find("  boy"))
\ No newline at end of file
diff --git a/Chapter 3/01_intro_to_strings.py b/Chapter 3/01_intro_to_strings.py
index 4fe027e..e39a4ab 100644
--- a/Chapter 3/01_intro_to_strings.py	
+++ b/Chapter 3/01_intro_to_strings.py	
@@ -3,4 +3,9 @@
 nameshort = name[0:3] # start from index 0 all the way till 3 (excluding 3)
 print(nameshort)
 character1 = name[1]
-print(character1)
\ No newline at end of file
+print(character1)
+name1="fayyaz"
+nameshort1=name1[1:5]
+print(nameshort1)
+character2=name1[3]
+print(character2)
\ No newline at end of file
diff --git a/Chapter 4 - PS/03_problem3.py b/Chapter 4 - PS/03_problem3.py
index 2ecf2b7..4561f87 100644
--- a/Chapter 4 - PS/03_problem3.py	
+++ b/Chapter 4 - PS/03_problem3.py	
@@ -1,3 +1,4 @@
 a = (34, 234, "Harry")
 
-a[2] = "Larry"
\ No newline at end of file
+a = a + ("Larry",)  # Tuples are immutable, so we create a new tuple
+print(a)
\ No newline at end of file
diff --git a/Chapter 5 - PS/09_problem9.py b/Chapter 5 - PS/09_problem9.py
index 1295416..8435ea1 100644
--- a/Chapter 5 - PS/09_problem9.py	
+++ b/Chapter 5 - PS/09_problem9.py	
@@ -1,3 +1,4 @@
 s = {8, 7, 12, "Harry", [1,2]}
 
-s[4][0] = 9
\ No newline at end of file
+s[4][0] = 9
+print(s)
\ No newline at end of file
diff --git a/Chapter 5/01_dict.py b/Chapter 5/01_dict.py
index 1f7920d..e8efaac 100644
--- a/Chapter 5/01_dict.py	
+++ b/Chapter 5/01_dict.py	
@@ -6,5 +6,5 @@
 }
 
 
-# print(marks, type(marks))
+print(marks, type(marks))
 print(marks["Harry"])
\ No newline at end of file
diff --git a/Chapter 5/02_dict_methods.py b/Chapter 5/02_dict_methods.py
index 1da6cea..3a5a48f 100644
--- a/Chapter 5/02_dict_methods.py	
+++ b/Chapter 5/02_dict_methods.py	
@@ -5,11 +5,11 @@
     0: "Harry"
 }
 
-# print(marks.items())
-# print(marks.keys())
-# print(marks.values())
-# marks.update({"Harry": 99, "Renuka": 100})
-# print(marks)
+print(marks.items())
+print(marks.keys())
+print(marks.values())
+marks.update({"Harry": 99, "Renuka": 100})
+print(marks)
 
 print(marks.get("Harry2")) # Prints None
 print(marks["Harry2"]) # Returns an error
\ No newline at end of file
diff --git a/Chapter 7 - PS/02_problem2.py b/Chapter 7 - PS/02_problem2.py
index a70cbb3..4c2f2b3 100644
--- a/Chapter 7 - PS/02_problem2.py	
+++ b/Chapter 7 - PS/02_problem2.py	
@@ -1,5 +1,5 @@
 l = ["Harry", "Soham", "Sachin", "Rahul"]
 
 for name in l:
-    if(name.startswith("S")):
+    if(name.startswith("R")):
         print(f"Hello {name}")
\ No newline at end of file
diff --git a/Chapter 7/01_loops.py b/Chapter 7/01_loops.py
index 4d13442..1a4d464 100644
--- a/Chapter 7/01_loops.py	
+++ b/Chapter 7/01_loops.py	
@@ -1,9 +1,9 @@
-print(1)
-print(2)
-print(3)
-print(4)
-print(5)
+# print(1)
+# print(2)
+# print(3)
+# print(4)
+# print(5)
 
 # The same task can be done like this:
-for i in range(1, 6):
+for i in range(1, 10):
     print(i)
\ No newline at end of file
diff --git a/Chapter 8 - PS/01_problem1.py b/Chapter 8 - PS/01_problem1.py
index b0a0a72..2a03176 100644
--- a/Chapter 8 - PS/01_problem1.py	
+++ b/Chapter 8 - PS/01_problem1.py	
@@ -2,8 +2,10 @@ def greatest(a, b, c):
     if(a>b and a>c):
         return a
     elif(b>a and b>c):
+        print("The greatest number is: b")
         return b
     elif(c>b and c>a):
+        print("The greatest number is: c")
         return c
 
 a = 1