diff --git a/module2/exo1/toy_notebook_en.ipynb b/module2/exo1/toy_notebook_en.ipynb
index 4be35c13d26466e725a36d3fcf77e02ebceddf2b..742c9d4434e23779b9a04e7436b136bacc941026 100644
--- a/module2/exo1/toy_notebook_en.ipynb
+++ b/module2/exo1/toy_notebook_en.ipynb
@@ -11,13 +11,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Asking the maths library"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
+    "## Asking the maths library\n",
     "My computer tells me that $\\pi$ is approximatively"
    ]
   },
@@ -43,19 +37,13 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Buffalo's needle"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
+    "## Buffalo's needle\n",
     "Applying the method of [Buffon’s needle](https://en.wikipedia.org/wiki/Buffon%27s_needle_problem), we get the __approximation__"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 9,
    "metadata": {},
    "outputs": [
     {
@@ -64,7 +52,7 @@
        "3.128911138923655"
       ]
      },
-     "execution_count": 5,
+     "execution_count": 9,
      "metadata": {},
      "output_type": "execute_result"
     }