README.md: Fix a typo

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 58d3220..eee4d1b 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ includes solutions that could have been made multiplatform.
 ### List of the exercises
 
 Format of an exercise label is '\<chapter\>\_\<group\>\_\<exercise\>'. Some
-chapters contain more groups of exercises. To differentiate those, an exercises
+chapters contain more groups of exercises. To differentiate those, an exercise
 group letter is included (the exact letters don't have a connection to the
 book). To make the exercise groups more visible in the list the first exercise
 of a group is in bold italics.