diff --git a/README.md b/README.md
index 730ce75..793d1f3 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,6 @@
 30 + 77 = 107
 57 / 9 = 6
 72 / 8 = 9
-60 - 21 = 39
 29 / 5 = 5
 85 / 9 = 9
 80 + 31 = 111