diff --git a/09-mostRepeatedChar/index.js b/09-mostRepeatedChar/index.js
index b113ed8..d165916 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
+  let freqCounter = [];
+  let textStr = text.toLowerCase();
+
+  for (let char of textStr) {
+    freqCounter[char] = freqCounter[char] + 1 || 1;
+  }
+
+  let maxCount = 0;
+  let maxChar = null;
+
+  for (let key in freqCounter) {
+    if (freqCounter[key] > maxCount) {
+      maxCount = freqCounter[key];
+      maxChar = key;
+    }
+  }
+  // implementar logica aqui
+  return maxChar;
+}
diff --git a/10-longestWords/index.js b/10-longestWords/index.js
index a98d2d8..bf7fc1f 100644
--- a/10-longestWords/index.js
+++ b/10-longestWords/index.js
@@ -1,4 +1,17 @@
 export function longestWords(words) {
-    // implementar logica aqui
-    
-}
\ No newline at end of file
+  let longestWord = "";
+  let longestWordsArray = [];
+  for (let i = 0; i < words.length; i++) {
+    if (words[i].length >= longestWord.length) {
+      longestWord = words[i];
+    }
+  }
+  for (let i = 0; i < words.length; i++) {
+    if (words[i].length == longestWord.length) {
+      longestWordsArray.push(words[i]);
+    }
+  }
+
+  return longestWordsArray;
+  // implementar logica aqui
+}