diff --git a/README.md b/README.md
index 02d0007..cf8f05c 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 81 - 85 = -4
 82 * 74 = 6068
 85 * 32 = 2720
+69 + 21 = 90