diff --git a/README.md b/README.md
index 9da0889..a3c321c 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,6 @@
 31 - 99 = -68
 57 / 4 = 14
 64 - 61 = 3
-61 - 51 = 10
 62 + 7 = 69
 19 * 5 = 95
 90 * 96 = 8640