diff --git a/09-mostRepeatedChar/index.js b/09-mostRepeatedChar/index.js
index b113ed8..94f5f95 100644
--- a/09-mostRepeatedChar/index.js
+++ b/09-mostRepeatedChar/index.js
@@ -1,4 +1,23 @@
 export function mostUsedChar(text) {
     // implementar logica aqui
-    return ""
-}
\ No newline at end of file
+    let arr = []
+
+    for (let i = 0; i < text.length; i++) {
+        arr.push(text[i])
+    }
+
+    let counts = {}
+
+    arr.forEach(count => {
+        counts[count] = (counts[count] || 0) + 1
+    })
+
+    const maxValue = Math.max(...Object.values(counts))
+    const mostUsed = Object.keys(counts).find((key) => {
+        return counts[key] === maxValue
+    })
+    
+    return mostUsed
+}
+
+mostUsedChar('banana')
\ No newline at end of file