diff --git a/README.md b/README.md
index 9e43650..ced306f 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,6 @@
 94 - 31 = 63
 10 * 93 = 930
 44 * 12 = 528
-15 - 59 = -44
 15 * 52 = 780
 72 * 10 = 720
 81 - 77 = 4