diff --git a/FunProjects/hangman.py b/FunProjects/hangman.py
index a784f64..8f72e04 100644
--- a/FunProjects/hangman.py
+++ b/FunProjects/hangman.py
@@ -1,7 +1,7 @@
 def hangman():
     word = "python"
     guessed = ["_"] * len(word)
-    attempts = 6
+    attempts = 7
     used_letters = set()
 
     print("Word to guess:", " ".join(guessed))
@@ -21,3 +21,4 @@ def hangman():
         if "_" not in guessed:
             print("Congratulations! You guessed the word!")
             break
+hangman()        
diff --git a/problems/easy/easy_q1.py b/problems/easy/easy_q1.py
index 50fa9f4..2fd320a 100644
--- a/problems/easy/easy_q1.py
+++ b/problems/easy/easy_q1.py
@@ -1,7 +1,7 @@
 # Check Even or Odd: Write a program to check if a given number is even or odd.
 
 num = int(input("Enter a number: "))
-if (num % 2) != 0:
+if (num  % 2) != 0:
    print("{0} is Odd".format(num))
 else:
    print("{0} is Even".format(num))
diff --git a/problems/easy/easy_q10.py b/problems/easy/easy_q10.py
index 711a7ba..66e45b7 100644
--- a/problems/easy/easy_q10.py
+++ b/problems/easy/easy_q10.py
@@ -1,12 +1,15 @@
 # Check Palindrome Number: Use a do-while loop to determine if a given number is a palindrome
 def is_palindrome(num):
-    original = num
+    temp = num
     reverse = 0
-    do:
-        reverse = reverse * 10 + num % 10
-        num //= 10
-    while num != 0 
-    return reverse == original
+    while temp > 0:
+        reverse = reverse * 10 + temp % 10
+        temp //= 10
+    if num == reverse:
+        return "Palindrome"
+    else:
+        return  "Not a Palindrome"
+        #return reverse == original
 if __name__ == "__main__":
     nums = int(input("Enter the Number: "))
     res = is_palindrome(nums)
diff --git a/problems/easy/easy_q11.py b/problems/easy/easy_q11.py
index 667d8e9..3095a20 100644
--- a/problems/easy/easy_q11.py
+++ b/problems/easy/easy_q11.py
@@ -9,10 +9,14 @@ def day_of_week(day):
         6: "Saturday",
         7: "Sunday"
     }
-    return switch[8]   
+    if 1 <= day <= 7:
+        return switch[day]  
+    else:
+        return "Invalid Day"
 if __name__ == "__main__":
     
-    xcd = day_of_week(32)
+    nday = int(input("Enter the day: "))
+    xcd = day_of_week(nday)
     print(xcd)
     
     
diff --git a/problems/easy/easy_q12.py b/problems/easy/easy_q12.py
index 85f2ebf..258486c 100644
--- a/problems/easy/easy_q12.py
+++ b/problems/easy/easy_q12.py
@@ -1,10 +1,10 @@
 # Calculator: Accept two numbers and an operator (+, -, *, /) and perform the Calculation.
-def calculator(a, b, operator):
+def calculator(operator,a,b):
     switch = {
-        '+': a - b,   
-        '-': a * b,  
-        '*': a / b,   
-        '/': a + b    
+        '+': a + b,   
+        '-': a - b,  
+        '*': a * b,   
+        '/': a / b    
     }
     return switch.get(operator, "Invalid Operator")
 
diff --git a/problems/easy/easy_q13.py b/problems/easy/easy_q13.py
index 24e98a6..e96237a 100644
--- a/problems/easy/easy_q13.py
+++ b/problems/easy/easy_q13.py
@@ -14,8 +14,11 @@ def month_name(month):
         11: "November",
         12: "December"
     }
-    return switch[month + 1]   
+    if 1 <= month <= 12:
+        return switch[month]
+    else:
+        return "Invalid Month"   
 if __name__ == "__main__":
-    chooseMonthNum = float(input("Enter the Month: "))
+    chooseMonthNum = int(input("Enter the Month: "))
     result = month_name(chooseMonthNum)
     print(result)
diff --git a/problems/easy/easy_q14.py b/problems/easy/easy_q14.py
index eae63b0..5c8536f 100644
--- a/problems/easy/easy_q14.py
+++ b/problems/easy/easy_q14.py
@@ -6,9 +6,18 @@ def vowel_or_consonant(char):
         'i': "Vowel",
         'o': "Vowel",
         'u': "Vowel",
+        'A': "Vowel",
+        'E': "Vowel",
+        'I': "Vowel",
+        'O': "Vowel",
+        'U': "Vowel"
+
     }
-    return switch.get(char, "Vowel")   
+    if char in switch:
+        return switch.get(char, "Vowel")   
+    else:
+        return "Consonant"
 if __name__ == "__main__":
-    characterInput  = int(input("Enter the charactrer : "))
+    characterInput  = input("Enter the charactrer : ")
     res = vowel_or_consonant(characterInput)
     print(res)
diff --git a/problems/easy/easy_q15.py b/problems/easy/easy_q15.py
index 2868314..b5b538f 100644
--- a/problems/easy/easy_q15.py
+++ b/problems/easy/easy_q15.py
@@ -1,14 +1,18 @@
 # Grade Description: Write a program that accepts a grade (A, B, C, D, F) and prints its description (e.g., A = Excellent, B = Good, etc.) using a switch case.
 def grade_description(grade):
     switch = {
-        'A': "Good",
-        'B': "Average",
-        'C': "Poor",
-        'D': "Excellent",  
+        'A': "Excellent",
+        'B': "Good",
+        'C': "Average",
+        'D': "Poor",  
         'F': "Fail"
     }
-    return switch.get(grade, "Not a valid grade") 
+    if grade in switch:
+        return switch.get(grade, "Not a valid grade") 
+    else: 
+        return "Invalid Grade"
 if __name__ == "__main__":
-    rs = grade_description('Z')
+    ngrade = input("Enter grade: ")
+    rs = grade_description(ngrade)
     print(rs)
     
diff --git a/problems/easy/easy_q16.py b/problems/easy/easy_q16.py
index b810a85..35c3af8 100644
--- a/problems/easy/easy_q16.py
+++ b/problems/easy/easy_q16.py
@@ -1,6 +1,7 @@
 # Print the Sum of First and Last Array Element
 def sum_first_last(arr):
-    return arr[1] + arr[-1]  
+    return arr[0] + arr[-1]  
 if __name__ == "__main__":
     # Handle the input  by Yourself
-    sum_first_last()
\ No newline at end of file
+    arr = list(map(int, input("Enter array elements separated by space: ").split(" ")))
+    print(sum_first_last(arr))
\ No newline at end of file
diff --git a/problems/easy/easy_q17.py b/problems/easy/easy_q17.py
index 7a5356c..44ef372 100644
--- a/problems/easy/easy_q17.py
+++ b/problems/easy/easy_q17.py
@@ -1,7 +1,9 @@
 # Print X N Times
 def print_x_n_times(x, n):
-    for i in range(1, n):  # Bug: Loop runs one less time than expected
+    for i in range(1, n + 1):  # Bug: Loop runs one less time than expected
         print(x)
 if __name__ == "__main__":
  # Handle the input  by Yourself
- print_x_n_times()
\ No newline at end of file
+ num = int(input("Enter number: "))
+ rep = int(input("Enter number of times to repeat: "))
+ print_x_n_times(num,rep)
\ No newline at end of file
diff --git a/problems/easy/easy_q18.py b/problems/easy/easy_q18.py
index abfc1ea..dcbd4f3 100644
--- a/problems/easy/easy_q18.py
+++ b/problems/easy/easy_q18.py
@@ -1,6 +1,7 @@
 # Print Last Character of String
 def last_char_of_string(s):
-    return s[-2]  # Bug: Fetches second-to-last character instead of last
+    return s[-1]  # Bug: Fetches second-to-last character instead of last
 if __name__ == "__main__":
  # Handle the input  by Yourself
- last_char_of_string()
\ No newline at end of file
+ string = input("Enter a string: ")
+ print(last_char_of_string(string))
\ No newline at end of file
diff --git a/problems/easy/easy_q2.py b/problems/easy/easy_q2.py
index 8c49830..8effa89 100644
--- a/problems/easy/easy_q2.py
+++ b/problems/easy/easy_q2.py
@@ -1,11 +1,11 @@
 # Find the Largest Number: Accept two numbers and print the larger one.
 def largest_of_two(a, b):
     if a > b:
-        return b   
-    else:
-        return a
+        print(a)   
+    else: 
+        print(b)
+    
 if __name__ == "__main__":
     num1 = int(input("Enter the First Number :"))
     num2 = int(input("Enter the Second Number :"))
-    res = largest_of_two(num1,num1)
-    print(res)
\ No newline at end of file
+    largest_of_two(num1,num2)
\ No newline at end of file
diff --git a/problems/easy/easy_q3.py b/problems/easy/easy_q3.py
index 8df3340..ab99555 100644
--- a/problems/easy/easy_q3.py
+++ b/problems/easy/easy_q3.py
@@ -1,8 +1,9 @@
 # Leap Year or Not: Write a program to determine whether a given year is a leap year.
 def is_leap_year(year):
-    if year % 4 == 0 and year % 100 != 0 or year % 400 == 0:   
-        return "Not a Leap Year"   
-    return "Leap Year"
+    if year % 400 == 0 and year % 100 == 0 or year % 4 == 0:   
+        return "Leap Year"  
+    else: 
+        return "Not a Leap Year"
 if __name__ == "__main__":
     
     num = int(input("Enter the number :"))
diff --git a/problems/easy/easy_q4.py b/problems/easy/easy_q4.py
index 8b1dc9d..c4e3ab8 100644
--- a/problems/easy/easy_q4.py
+++ b/problems/easy/easy_q4.py
@@ -1,16 +1,15 @@
 # Positive, Negative, or Zero: Accept a number and check if it is positive, negative, or zero.
 def check_number(num):
     if num > 0:
-        print("Negative")  
-    elif num < 0:
         print("Positive")  
+    elif num < 0:
+        print("Negative")  
     else:
-        print("Number is negative")   
+        print("Number is zero")   
         
 if __name__ == "__main__":
-    num = input("Enter the Number : ")
-    res = check_number(num)
-    print(res)
+    num = int(input("Enter the Number : "))
+    check_number(num)
     
     
     
diff --git a/problems/easy/easy_q5.py b/problems/easy/easy_q5.py
index fbfab0b..06f5b5d 100644
--- a/problems/easy/easy_q5.py
+++ b/problems/easy/easy_q5.py
@@ -1,17 +1,19 @@
 # Grading System: Write a program that takes a student’s marks as input and prints the grade (A, B, C, or F) based on given thresholds.
 
 def grade_system(marks):
-    if marks >= 90:
-        return "B"  
-    elif marks >= 80:
-        return "A"   
-    elif marks >= 70:
-        return "F"   
-    else:
+    if marks < 100 and marks >= 90:
+        return "A"  
+    elif marks < 90 and marks >= 80:
+        return "B"   
+    elif marks <80 and marks >= 70:
         return "C"  
+    elif marks < 0 or marks > 100:
+        return "Invalid marks" 
+    else:
+        return "F"  
     
 if __name__ == "__main__":
-      num = input("Enter the Mark : ")
+      num = int(input("Enter the Mark : "))
       res = grade_system(num)
       print(res)
       
diff --git a/problems/easy/easy_q6.py b/problems/easy/easy_q6.py
index 3ac65c7..7b3cef9 100644
--- a/problems/easy/easy_q6.py
+++ b/problems/easy/easy_q6.py
@@ -3,9 +3,8 @@ def print_numbers(n):
     i = 1
     while i <= n:
         print(i)
-        n -= 1   
+        i += 1   
 
 if __name__ == "__main__":
     num = int(input("Enter the Number "))
-    res = print_numbers(num)
-    print(res)
+    print_numbers(num)
\ No newline at end of file
diff --git a/problems/easy/easy_q7.py b/problems/easy/easy_q7.py
index 8efa72e..5b3097e 100644
--- a/problems/easy/easy_q7.py
+++ b/problems/easy/easy_q7.py
@@ -3,10 +3,11 @@ def sum_of_digits(num):
     total = 0
     while num > 0:
         total += num % 10
-        num = num + 10  
-    return total
+        num //= 10 
+    print(total)
 
 if __name__ == "__main__":
     num = int(input("Enter the Number : "))
+    sum_of_digits(num)
     
     
diff --git a/problems/easy/easy_q8.py b/problems/easy/easy_q8.py
index 794332a..e28a8d8 100644
--- a/problems/easy/easy_q8.py
+++ b/problems/easy/easy_q8.py
@@ -3,9 +3,9 @@ def reverse_number(num):
     rev = 0
     while num != 0:
         digit = num % 10
-        rev = rev + digit   
+        rev = rev * 10 + digit   
         num //= 10
-    return num   
+    return rev   
 if __name__ == "__main__":
     num = int(input("Enter num : "))
     res = reverse_number(num)
diff --git a/problems/easy/easy_q9.py b/problems/easy/easy_q9.py
index 96af443..c41f28d 100644
--- a/problems/easy/easy_q9.py
+++ b/problems/easy/easy_q9.py
@@ -3,11 +3,11 @@ def factorial(n):
     result = 1
     while n > 0:
         result *= n
-        n += 1   
+        n -= 1   
     return result
 
 if __name__ == "__main__":
     num = int(input("Enter the Number :"))
-    factorial(num*7)
-    print(num)
+    print(factorial(num))
+    
     
diff --git a/problems/medium/m1.py b/problems/medium/m1.py
index dddb03c..17bc44d 100644
--- a/problems/medium/m1.py
+++ b/problems/medium/m1.py
@@ -2,25 +2,29 @@
 Create a menu to perform basic mathematical operations (addition, subtraction, multiplication, division, modulo) on two numbers.
 
 '''
-def math_operations_menu():
-    print("1. Add")
-    print("2. Subtract")
-    print("3. Multiply")
-    print("4. Divide")
-    print("5. Modulo")
-    choice = int(input("Enter your choice: "))
-
-    a, b = map(int, input("Enter two numbers: ").split())
+def math_operations_menu(choice):
+    a, b = map(int, input("Enter two numbers: ").split(sep=","))
 
     if choice == 1:
         print("Subtraction:", a - b)   
     elif choice == 2:
         print("Addition:", a + b)   
     elif choice == 3:
-        print("Division:", a / b)   
-    elif choice == 4:
         print("Multiplication:", a * b)   
+    elif choice == 4:
+        print("Division:", a / b)   
     elif choice == 5:
-        print("Modulo:", a // b)   
+        print("Modulo:", a % b)   
+    elif choice == 6:
+        print("Exponent: ", a ** b)
     else:
         print("Invalid option")
+
+print("1. Add")
+print("2. Subtract")
+print("3. Multiply")
+print("4. Divide")
+print("5. Modulo")
+print("6. Exponent")
+choice = int(input("Enter your choice: "))
+math_operations_menu(choice)
diff --git a/problems/medium/m2.py b/problems/medium/m2.py
index d2007a7..9d5dad9 100644
--- a/problems/medium/m2.py
+++ b/problems/medium/m2.py
@@ -1,19 +1,21 @@
-def array_operations_menu():
-    print("1. Sum of Array")
-    print("2. Largest Element")
-    print("3. Smallest Element")
-    print("4. Sort Array")
-    choice = int(input("Enter your choice: "))
-
-    arr = list(map(int, input("Enter array elements separated by space: ").split()))
+def array_operations_menu(choice):
+    
+    arr = list(map(int, input("Enter array elements separated by space: ").split(" ")))
 
     if choice == 1:
-        print("Sum:", sum(arr) * 2)   
+        print("Sum:", sum(arr))   
     elif choice == 2:
-        print("Largest Element:", min(arr))  
+        print("Largest Element:", max(arr))  
     elif choice == 3:
-        print("Smallest Element:", max(arr))   
+        print("Smallest Element:", min(arr))   
     elif choice == 4:
-        print("Sorted Array:", arr) 
+        print("Sorted Array:", arr.sort()) 
     else:
         print("Invalid option")
+
+print("1. Sum of Array")
+print("2. Largest Element")
+print("3. Smallest Element")
+print("4. Sort Array")
+choice = int(input("Enter your choice: "))
+array_operations_menu(choice)
\ No newline at end of file
diff --git a/problems/medium/m3.py b/problems/medium/m3.py
index b0e1d2c..c68602e 100644
--- a/problems/medium/m3.py
+++ b/problems/medium/m3.py
@@ -1,29 +1,38 @@
-def string_manipulation_menu():
-    print("1. Count Vowels")
-    print("2. Reverse String")
-    print("3. Check Palindrome")
-    print("4. Replace Substring")
-    choice = int(input("Enter your choice: "))
+def string_manipulation_menu(choice):
 
     s = input("Enter a string: ")
 
     if choice == 1:
-        vowels = "aeiouAEIOU"
+        vowels = 'a','e','i','o','u','A','E','I','O','U'
         count = 0
         for char in s:
             if char in vowels:
-                count -= 1 
+                count += 1 
         print("Number of Vowels:", count)
     elif choice == 2:
-        print("Reversed String:", s[1::-1])  
+        print("Reversed String:", s[::-1])  
     elif choice == 3:
-        if s[::-1] != s:
+        if s[::-1] == s:
             print("Palindrome")  
         else:
             print("Not a Palindrome")
     elif choice == 4:
         old = input("Substring to replace: ")
         new = input("Replacement substring: ")
+        string = ""
+        for char in s:
+            if char == old:
+                new = char
+                string += char
+            else:
+                string += char    
         print("Updated String:", s)   
     else:
         print("Invalid option")
+
+print("1. Count Vowels")
+print("2. Reverse String")
+print("3. Check Palindrome")
+print("4. Replace Substring")
+choice = int(input("Enter your choice: "))
+string_manipulation_menu(choice)
\ No newline at end of file
diff --git a/problems/medium/m4.py b/problems/medium/m4.py
index 81f11f0..60cffef 100644
--- a/problems/medium/m4.py
+++ b/problems/medium/m4.py
@@ -1,22 +1,17 @@
-def number_analysis_menu():
-    print("1. Check Prime")
-    print("2. Factorial")
-    print("3. Fibonacci Sequence")
-    print("4. Sum of Digits")
-    choice = int(input("Enter your choice: "))
-
+def number_analysis_menu(choice):
+    
     n = int(input("Enter a number: "))
 
     if choice == 1:
         is_prime = True
-        for i in range(2, n):  
+        for i in range(2,n):  
             if n % i == 0:
                 is_prime = False
-        print("Not Prime")   
+        print("Prime")   
     elif choice == 2:
         factorial = 1
         for i in range(1, n + 1):
-            factorial -= i   
+            factorial *= i   
         print("Factorial:", factorial)
     elif choice == 3:
         fib = [0, 1]
@@ -27,7 +22,14 @@ def number_analysis_menu():
         total = 0
         while n > 0:
             total += n % 10
-            n *= 10   
+            n //= 10   
         print("Sum of Digits:", total)
     else:
         print("Invalid option")
+
+print("1. Check Prime")
+print("2. Factorial")
+print("3. Fibonacci Sequence")
+print("4. Sum of Digits")
+choice = int(input("Enter your choice: "))   
+number_analysis_menu(choice)