diff --git a/09-mostRepeatedChar/index.js b/09-mostRepeatedChar/index.js
index b113ed8..9151855 100644
--- a/09-mostRepeatedChar/index.js
+++ b/09-mostRepeatedChar/index.js
@@ -1,4 +1,18 @@
 export function mostUsedChar(text) {
-    // implementar logica aqui
-    return ""
+    let cont = 0, i, j, contador = 0, valorFinal;
+    let texto = text.split("");
+
+    for (let i = 0; i < texto.length; i++) {
+        cont = 0;
+        for (let j = 0; j < texto.length; j++) {
+            if (texto[i].toUpperCase() === texto[j].toUpperCase()) {
+                cont++
+            }
+        }
+        if (cont >= contador) {
+            contador = cont;
+            valorFinal = texto[i]
+        }
+    }
+    return valorFinal;
 }
\ No newline at end of file