diff --git a/README.md b/README.md
index 174c63d..616ba96 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,6 @@
 33 / 5 = 6
 84 / 6 = 14
 94 - 31 = 63
-72 - 21 = 51
 3 - 35 = -32
 7 + 48 = 55
 10 * 93 = 930