diff --git a/Book_1.ipynb b/Book_1.ipynb
index a217904..e4e7bc0 100644
--- a/Book_1.ipynb
+++ b/Book_1.ipynb
@@ -18,7 +18,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 1,
    "id": "1e6ac084-5bf9-43f7-a7a6-8c8e20066159",
    "metadata": {},
    "outputs": [],
@@ -661,6 +661,121 @@
     "    seeds = new_seeds\n",
     "min([seed['start'] for seed in seeds])"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "30d277d2-13e8-45d6-87da-ef02fa3d9779",
+   "metadata": {},
+   "source": [
+    "## Puzzel 6"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "68cefad3-f476-4a7e-8ea2-93affd97daf6",
+   "metadata": {},
+   "source": [
+    "## Deel 1"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "75e6d50f-7c27-4aed-b948-f819d9347ab1",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[358, 1054, 1807, 1080] [46, 68, 98, 66]\n"
+     ]
+    }
+   ],
+   "source": [
+    "data = open('data/puzzle_6.txt', 'r').readlines()\n",
+    "times = [int(time) for time in re.findall(r'(\\d+)', data[0])]\n",
+    "distances = [int(distance) for distance in re.findall(r'(\\d+)', data[1])]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "7213a72f-3421-43b2-afff-3b959f1d8380",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "138915"
+      ]
+     },
+     "execution_count": 9,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "total_wins = []\n",
+    "for time, distance in zip(times, distances):\n",
+    "    wins = 0\n",
+    "    for time_pressed in range(0, time+1):\n",
+    "        distance_travelled = time_pressed * (time-time_pressed)\n",
+    "        if distance_travelled > distance:\n",
+    "            wins += 1\n",
+    "    total_wins.append(wins)\n",
+    "score = 1\n",
+    "for win in total_wins:\n",
+    "    score = score*win\n",
+    "score\n",
+    "    "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "efa4bdfd-636d-4d55-a4a1-9a4a4d300ab2",
+   "metadata": {},
+   "source": [
+    "## Deel 2"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 25,
+   "id": "bf365352-52df-4495-a685-27595ff908fe",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "9674509.498754364 37015356.50124563\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "27340847"
+      ]
+     },
+     "execution_count": 25,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "time = [time for time in re.findall(r'(\\d+)', data[0])]\n",
+    "time = int(''.join(time))\n",
+    "distance = [distance for distance in re.findall(r'(\\d+)', data[1])]\n",
+    "distance = int(''.join(distance))\n",
+    "\n",
+    "\n",
+    "discriminant = (time**2) - (4 * distance)\n",
+    "x0 = ((-time) + np.sqrt(discriminant))/-2\n",
+    "x1 = ((-time) - np.sqrt(discriminant))/-2\n",
+    "print(x0, x1)\n",
+    "round(x1) - round(x0)-1"
+   ]
   }
  ],
  "metadata": {
diff --git a/pretty_read.md b/pretty_read.md
index 4a6174d..f212a6a 100644
--- a/pretty_read.md
+++ b/pretty_read.md
@@ -429,3 +429,68 @@ min([seed['start'] for seed in seeds])
     2254686
 
 
+
+## Puzzel 6
+
+## Deel 1
+
+
+```python
+data = open('data/puzzle_6.txt', 'r').readlines()
+times = [int(time) for time in re.findall(r'(\d+)', data[0])]
+distances = [int(distance) for distance in re.findall(r'(\d+)', data[1])]
+```
+
+    [358, 1054, 1807, 1080] [46, 68, 98, 66]
+    
+
+
+```python
+total_wins = []
+for time, distance in zip(times, distances):
+    wins = 0
+    for time_pressed in range(0, time+1):
+        distance_travelled = time_pressed * (time-time_pressed)
+        if distance_travelled > distance:
+            wins += 1
+    total_wins.append(wins)
+score = 1
+for win in total_wins:
+    score = score*win
+score
+    
+```
+
+
+
+
+    138915
+
+
+
+## Deel 2
+
+
+```python
+time = [time for time in re.findall(r'(\d+)', data[0])]
+time = int(''.join(time))
+distance = [distance for distance in re.findall(r'(\d+)', data[1])]
+distance = int(''.join(distance))
+
+
+discriminant = (time**2) - (4 * distance)
+x0 = ((-time) + np.sqrt(discriminant))/-2
+x1 = ((-time) - np.sqrt(discriminant))/-2
+print(x0, x1)
+round(x1) - round(x0)-1
+```
+
+    9674509.498754364 37015356.50124563
+    
+
+
+
+
+    27340847
+
+