diff --git a/README.md b/README.md
index bf8cb97..e32d11f 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 69 * 71 = 4899
 54 - 79 = -25
 26 - 39 = -13
+51 - 62 = -11