diff --git a/core-java-modules/core-java-numbers-5/README.md b/core-java-modules/core-java-numbers-5/README.md
index 37501ea31a..f54894a227 100644
--- a/core-java-modules/core-java-numbers-5/README.md
+++ b/core-java-modules/core-java-numbers-5/README.md
@@ -2,3 +2,4 @@
 - [Check if a Number Is Odd or Even](https://www.baeldung.com/java-check-number-parity)
 - [How to Check Whether an Integer Exists in a Range with Java](https://www.baeldung.com/java-interval-contains-integer)
 - [Check if a Number Is Positive or Negative in Java](https://www.baeldung.com/java-check-number-positive-negative)
+- [Armstrong Numbers in Java](https://www.baeldung.com/java-armstrong-numbers)