diff --git a/README.md b/README.md
index cd1000f..1ad1f98 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,6 @@
 88 - 25 = 63
 70 - 56 = 14
 57 * 13 = 741
-20 - 49 = -29
 72 * 97 = 6984
 22 + 67 = 89
 23 - 1 = 22