diff --git a/README.md b/README.md
index 21e23da..72e976c 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,6 @@
 88 - 25 = 63
 72 * 97 = 6984
 22 + 67 = 89
-23 - 1 = 22
 52 + 15 = 67
 96 - 50 = 46
 32 - 66 = -34