diff --git a/09-mostRepeatedChar/index.js b/09-mostRepeatedChar/index.js
index b113ed8..d918f39 100644
--- a/09-mostRepeatedChar/index.js
+++ b/09-mostRepeatedChar/index.js
@@ -1,4 +1,20 @@
 export function mostUsedChar(text) {
-    // implementar logica aqui
-    return ""
-}
\ No newline at end of file
+  // implementar logica aqui
+  let newText = text.toLowerCase();
+  let newLetterRep;
+  let letraRep = 0;
+  for (let i = 0; i < newText.length; i++) {
+    let letra = newText[i];
+    let cont = 0;
+    for (let j = 0; j < newText.length; j++) {
+      if (letra == newText[j]) {
+        cont++;
+        if (cont > letraRep) {
+          letraRep = cont;
+          newLetterRep = newText[i];
+        }
+      }
+    }
+  }
+  return newLetterRep;
+}