diff --git a/README.md b/README.md
index a1cc97c..71d345c 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,6 @@
 54 - 79 = -25
 26 - 39 = -13
 37 / 6 = 6
-31 - 99 = -68
 57 / 4 = 14
 64 - 61 = 3
 62 + 7 = 69