diff --git a/module2/exo1/toy_notebook_en.ipynb b/module2/exo1/toy_notebook_en.ipynb
index b4b9ff9a27ed91ef6040628d13f1b95d667c8b4b..f757e35936e059513108858c5dff3c6917f85276 100644
--- a/module2/exo1/toy_notebook_en.ipynb
+++ b/module2/exo1/toy_notebook_en.ipynb
@@ -9,7 +9,7 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {"hideCode": false},
    "source": [
     "## Asking the maths library\n",
     "My computer tells me that $\\pi$ is *approximatively*"
@@ -18,7 +18,9 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "metadata": {},
+   "metadata": {"hideCode": false,
+  "hidePrompt": false,
+  "scrolled": true},
    "outputs": [
     {
      "name": "stdout",
@@ -35,7 +37,7 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {"hidePrompt": false},
    "source": [
     "## Buffon's needle\n",
     "Applying the method of [Buffon's needle](https://en.wikipedia.org/wiki/Buffon%27s_needle_problem), we get the __approximation__"
@@ -44,12 +46,13 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "metadata": {},
+   "metadata": {"hideCode": false,
+  "hidePrompt": false},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "3.128911138923655"
+       "3.1289111389236548"
       ]
      },
      "execution_count": 2,
@@ -68,7 +71,7 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": { "hideCode": false},
    "source": [
     "## Using a surface fraction argument\n",
     "A method that is easier to understand and does not make use of the $\\sin$ function is based on the fact that if $X\\sim U(0,1)$ and $Y\\sim U(0,1)$, then $P[X^2+Y^2\\leq 1] = \\pi/4$ (see [\"Monte Carlo method\" on Wikipedia](https://en.wikipedia.org/wiki/Monte_Carlo_method)). The following code uses this approach:"
@@ -77,9 +80,7 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "metadata": {
-    "scrolled": true
-   },
+   "metadata": {},
    "outputs": [
     {
      "data": {
@@ -127,7 +128,7 @@
     {
      "data": {
       "text/plain": [
-       "3.112"
+       "3.1120000000000001"
       ]
      },
      "execution_count": 4,