diff --git a/main.py b/main.py
index 379f286..0e9d269 100644
--- a/main.py
+++ b/main.py
@@ -1,29 +1,32 @@
+import math
 def hello_world():
     '''Prints "Hello World!".'''
-    return
+    print("Hello World")
+    return 
 
 
 def sum(a, b):
     '''Accepts 2 numbers as parameters, returns sum of a and b.'''
-    return 0
+    return a + b
 
 
 def sub(a, b):
     '''Accepts 2 numbers as parameters, returns subtraction of a and b.'''
-    return 0
+    return a - b
 
 
 def product(a, b):
     '''Accepts 2 numbers as parameters, returns product of a and b.'''
     # CHALLENGE: use a for loop and your sum function to implement product
-    return 0
+    return a * b
 
 
 def divide(a, b):
     '''Accepts 2 numbers as parameters, returns a divided by b.'''
     # only pass in numbers that are divisible for sake of implementation
     # CHALLENGE: use a while loop and your sub function to implement divide
-    return 0
+    if b != 0:
+        return a/b
 
 
 def root(num):
@@ -31,7 +34,9 @@ def root(num):
     # only pass in numbers that are perfect squares for sake of implementation
     # leetcode easy
     # CHALLENGE: do not use any built-in Python functions
-    return 0;
+    x = math.sqrt(num)
+    if x - int(x) == 0:
+        return x
 
 
 def main():
@@ -50,4 +55,4 @@ def main():
     # Add any additional test cases if needed
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()
diff --git a/main2.py b/main2.py
index 2f6ad21..ab38ce9 100644
--- a/main2.py
+++ b/main2.py
@@ -2,7 +2,13 @@ def oddOrEven(nums):
     '''Given an unsorted list of numbers, return a list that indicates if the value at each index is odd (0) or even (1).'''
     # EXAMPLE:
     # Given [2, 4, 5, 7, 8, 10], return [1, 1, 0, 0, 1, 1]
-    return []
+    x = []
+    for i in nums:
+        if i % 2 == 0:
+            x.append(1)
+        else:
+            x.append(0)
+    return x
 
 
 def mostOccurences(nums):
@@ -10,7 +16,13 @@ def mostOccurences(nums):
     # Hint: use oddOrEven to test function faster
     # Hint: use a map
     # Hint: https://stackoverflow.com/questions/13098638/how-to-iterate-over-the-elements-of-a-map-in-python
-    return -1 
+    d = {}
+    for i in nums:
+        if i in d.keys():
+          d[i] += 1
+        else:
+            d[i] = 0
+    return max(d, key=d.get)
 
 
 def main():
@@ -23,4 +35,4 @@ def main():
     # Add any additional test cases if needed
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()