diff --git a/README.md b/README.md
index 9d1b07e..db93ed6 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 41 * 21 = 861
 68 * 83 = 5644
 77 / 7 = 11
+93 - 66 = 27