diff --git a/ipynb/Cheryl.ipynb b/ipynb/Cheryl.ipynb
index f939522..f4af940 100644
--- a/ipynb/Cheryl.ipynb
+++ b/ipynb/Cheryl.ipynb
@@ -20,7 +20,7 @@
       "This logic puzzle has been [making the rounds](https://www.google.com/webhp?#q=cheryl%27s+birthday):\n",
       "\n",
       "\n",
-      "1. Albert and Bernard just became friends with Cheryl, and they want to know when her birtxhday is. Cheryl gave them a list of 10 possible dates:\n",
+      "1. Albert and Bernard just became friends with Cheryl, and they want to know when her birthday is. Cheryl gave them a list of 10 possible dates:\n",
       "<pre>\n",
       "       May 15     May 16     May 19\n",
       "      June 17    June 18\n",