diff --git a/README.md b/README.md
index fb31f62..93db8c9 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,4 @@
 96 / 2 = 48
 49 * 66 = 3234
 52 * 32 = 1664
+64 - 41 = 23