diff --git a/main.py b/main.py
index 379f286..4c019ab 100644
--- a/main.py
+++ b/main.py
@@ -5,25 +5,28 @@ def hello_world():
 
 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
+    product = 0
+    for i in range(a):
+        product = product + b
+    return product
 
 
 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
+    return (a / b)
 
 
 def root(num):
@@ -31,7 +34,12 @@ 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;
+    i = 0
+    for i in range(1000000000):
+        if i*i == num:
+          break
+        ++i;
+    return i
 
 
 def main():
diff --git a/main2.py b/main2.py
new file mode 100644
index 0000000..497be38
--- /dev/null
+++ b/main2.py
@@ -0,0 +1,45 @@
+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]
+    returnList = []
+    for item in nums:
+        if item % 2 == 0:
+            returnList.append(1)
+        else:
+            returnList.append(0)
+    return returnList
+
+
+def mostOccurences(nums):
+    '''Given an unsorted list of numbers, returns the value that occured the most in 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
+    map = {}
+    for item in nums:
+        if item in map:
+            map[item] += 1
+        else:
+            map[item] = 1
+    
+    currentMax = list(map.keys())[0]
+    for key in map:
+        if map[key] > map[currentMax]:
+            currentMax = key
+    return currentMax
+
+
+def main():
+    '''The main function is where you will test all of your functions.'''
+    # Testing challenge 2
+    print("\nTesting oddOrEven")
+    print("EXPECTED:", [1, 1, 0, 0, 1, 1], "\nACTUAL:", oddOrEven([2, 4, 5, 7, 8, 10]))
+    print("\nTesting mostOccurences")
+    print("EXPECTED:", 1, "\nACTUAL:", mostOccurences(oddOrEven([2, 4, 5, 7, 8, 10])))
+    print("EXPECTED:", 4, "\nACTUAL:", mostOccurences([2, 4, 5, 7, 4, 10]))
+    print("EXPECTED:", 2, "\nACTUAL:", mostOccurences([2, 2, 5, 2, 2, 10]))
+    # Add any additional test cases if needed
+
+if __name__ == "__main__":
+    main()
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