diff --git a/09-mostRepeatedChar/index.js b/09-mostRepeatedChar/index.js
index b113ed8..fddff13 100644
--- a/09-mostRepeatedChar/index.js
+++ b/09-mostRepeatedChar/index.js
@@ -1,4 +1,19 @@
 export function mostUsedChar(text) {
     // implementar logica aqui
-    return ""
+    let textLower = text.toLowerCase().split('');
+    let caractereMaisRepetido;
+    let numeroDeCaractereRepetido = 0;
+
+    textLower.forEach(element => {
+        let caracteresRepetidos = textLower.filter((x) => x === element);
+
+        if (caracteresRepetidos.length > numeroDeCaractereRepetido) {
+            caractereMaisRepetido = caracteresRepetidos.filter((caractere, indice) => {
+                return caracteresRepetidos.indexOf(caractere) === indice
+            })
+            numeroDeCaractereRepetido = caracteresRepetidos.length
+        }
+    });
+
+    return caractereMaisRepetido.toString()
 }
\ No newline at end of file