diff --git a/eating_cookies/eating_cookies.py b/eating_cookies/eating_cookies.py
index 62655d803..abaf58f6a 100644
--- a/eating_cookies/eating_cookies.py
+++ b/eating_cookies/eating_cookies.py
@@ -6,7 +6,29 @@
 # a solution that is more efficient than the naive 
 # recursive solution
 def eating_cookies(n, cache=None):
-  pass
+    if n < 0:
+      return 0
+    elif n == 0:
+      return 1
+
+    return eating_cookies(n-1) + eating_cookies(n-2) + eating_cookies(n-3)
+
+cache = {
+    0: 0,
+    1: 1
+}
+
+def cookie_cache(n):
+    global cache
+
+    if n in cache:
+        return cache[n]
+
+    cache[n] = cookie_cache(n-1) + cookie_cache(n-2) + cookie_cache(n-3)
+
+    return cache[n]
+
+
 
 if __name__ == "__main__":
   if len(sys.argv) > 1:
diff --git a/recipe_batches/recipe_batches.py b/recipe_batches/recipe_batches.py
index c845950c5..3fa39215e 100644
--- a/recipe_batches/recipe_batches.py
+++ b/recipe_batches/recipe_batches.py
@@ -4,7 +4,18 @@
 
 def recipe_batches(recipe, ingredients):
   pass 
+  min_num = 1000000
 
+  for key in recipe:
+    if key in ingredients:
+      num_batches = ingredients[key] / recipe[key]
+      if num_batches < min_num:
+        min_num = int(num_batches)
+
+    else:
+      min_num = 0
+
+  return min_num    
 
 if __name__ == '__main__':
   # Change the entries of these dictionaries to test 
diff --git a/stock_prices/stock_prices.py b/stock_prices/stock_prices.py
index 9de20bc94..ca2e38ff8 100644
--- a/stock_prices/stock_prices.py
+++ b/stock_prices/stock_prices.py
@@ -4,7 +4,15 @@
 
 def find_max_profit(prices):
   pass
+  min_price = prices[0]
+  max_profit = prices[1] - min_price
 
+  for i in range(len(prices)):
+    for j in range(i + 1, len(prices)):
+      if prices[j] - prices[i] > max_profit:
+        max_profit = prices[j] - prices[i]
+
+  return max_profit
 
 if __name__ == '__main__':
   # This is just some code to accept inputs from the command line