diff --git a/05-Recursion/.ipynb_checkpoints/02-Recursion Homework Example Problems-checkpoint.ipynb b/05-Recursion/.ipynb_checkpoints/02-Recursion Homework Example Problems-checkpoint.ipynb
index 60eae68..250e3d9 100644
--- a/05-Recursion/.ipynb_checkpoints/02-Recursion Homework Example Problems-checkpoint.ipynb	
+++ b/05-Recursion/.ipynb_checkpoints/02-Recursion Homework Example Problems-checkpoint.ipynb	
@@ -26,22 +26,38 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
     "def rec_sum(n):\n",
-    "    \n",
-    "    pass"
+    "\n",
+    "    # Base case \n",
+    "    if n == 0:\n",
+    "        return 0\n",
+    "    else:\n",
+    "\n",
+    "        return n + rec_sum(n-1)"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "55"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "rec_sum(4)"
+    "rec_sum(10)"
    ]
   },
   {
@@ -57,19 +73,36 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [],
    "source": [
     "def sum_func(n):\n",
-    "    pass"
+    "    # Base case \n",
+    "    if len(str(n)) == 1:\n",
+    "        \n",
+    "        return n\n",
+    "    else:\n",
+    "        return (n%10) + sum_func(n//10)\n",
+    "    "
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 11,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "10"
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "sum_func(4321)"
    ]
@@ -103,7 +136,10 @@
   {
    "cell_type": "markdown",
    "metadata": {
-    "collapsed": true
+    "collapsed": true,
+    "jupyter": {
+     "outputs_hidden": true
+    }
    },
    "source": [
     "We'll need to think of this function recursively by knowing that:\n",
@@ -125,39 +161,79 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [],
    "source": [
-    "word_split('themanran',['the','ran','man'])"
+    "def word_split(phrase,list_of_words, output = None):\n",
+    "    #base case.\n",
+    "    if output is None:\n",
+    "        output = []\n",
+    "    for word in list_of_words:\n",
+    "        if phrase.startswith(word):\n",
+    "            output.append(word)\n",
+    "            return word_split(phrase[len(word):], list_of_words, output)\n",
+    "    return output        "
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 19,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['the', 'man', 'ran']"
+      ]
+     },
+     "execution_count": 19,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "word_split('ilovedogsJohn',['i','am','a','dogs','lover','love','John'])"
+    "word_split('themanran',['the','ran','man'])"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 20,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['i', 'love', 'dogs', 'John']"
+      ]
+     },
+     "execution_count": 20,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "word_split('themanran',['clown','ran','man'])"
+    "word_split('ilovedogsJohn',['i','am','a','dogs','lover','love','John'])"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 21,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[]"
+      ]
+     },
+     "execution_count": 21,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "def word_split(phrase,list_of_words, output = None):\n",
-    "    pass      "
+    "word_split('themanran',['clown','ran','man'])"
    ]
   },
   {
@@ -172,7 +248,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -186,9 +262,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.10"
+   "version": "3.12.1"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 1
+ "nbformat_minor": 4
 }
diff --git a/05-Recursion/02-Recursion Homework Example Problems.ipynb b/05-Recursion/02-Recursion Homework Example Problems.ipynb
index 60eae68..250e3d9 100644
--- a/05-Recursion/02-Recursion Homework Example Problems.ipynb	
+++ b/05-Recursion/02-Recursion Homework Example Problems.ipynb	
@@ -26,22 +26,38 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
     "def rec_sum(n):\n",
-    "    \n",
-    "    pass"
+    "\n",
+    "    # Base case \n",
+    "    if n == 0:\n",
+    "        return 0\n",
+    "    else:\n",
+    "\n",
+    "        return n + rec_sum(n-1)"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "55"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "rec_sum(4)"
+    "rec_sum(10)"
    ]
   },
   {
@@ -57,19 +73,36 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [],
    "source": [
     "def sum_func(n):\n",
-    "    pass"
+    "    # Base case \n",
+    "    if len(str(n)) == 1:\n",
+    "        \n",
+    "        return n\n",
+    "    else:\n",
+    "        return (n%10) + sum_func(n//10)\n",
+    "    "
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 11,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "10"
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "sum_func(4321)"
    ]
@@ -103,7 +136,10 @@
   {
    "cell_type": "markdown",
    "metadata": {
-    "collapsed": true
+    "collapsed": true,
+    "jupyter": {
+     "outputs_hidden": true
+    }
    },
    "source": [
     "We'll need to think of this function recursively by knowing that:\n",
@@ -125,39 +161,79 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [],
    "source": [
-    "word_split('themanran',['the','ran','man'])"
+    "def word_split(phrase,list_of_words, output = None):\n",
+    "    #base case.\n",
+    "    if output is None:\n",
+    "        output = []\n",
+    "    for word in list_of_words:\n",
+    "        if phrase.startswith(word):\n",
+    "            output.append(word)\n",
+    "            return word_split(phrase[len(word):], list_of_words, output)\n",
+    "    return output        "
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 19,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['the', 'man', 'ran']"
+      ]
+     },
+     "execution_count": 19,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "word_split('ilovedogsJohn',['i','am','a','dogs','lover','love','John'])"
+    "word_split('themanran',['the','ran','man'])"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 20,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['i', 'love', 'dogs', 'John']"
+      ]
+     },
+     "execution_count": 20,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "word_split('themanran',['clown','ran','man'])"
+    "word_split('ilovedogsJohn',['i','am','a','dogs','lover','love','John'])"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 21,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[]"
+      ]
+     },
+     "execution_count": 21,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "def word_split(phrase,list_of_words, output = None):\n",
-    "    pass      "
+    "word_split('themanran',['clown','ran','man'])"
    ]
   },
   {
@@ -172,7 +248,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
@@ -186,9 +262,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.10"
+   "version": "3.12.1"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 1
+ "nbformat_minor": 4
 }