diff --git a/01-greeting/index.js b/01-greeting/index.js
index 8f551af..5c0279c 100644
--- a/01-greeting/index.js
+++ b/01-greeting/index.js
@@ -1,4 +1,4 @@
 export function greet(name) {
   // implementar logica aqui
-  return "";
+  return `Hello ${name}`;
 }
diff --git a/02-triangleArea/index.js b/02-triangleArea/index.js
index 7628fcd..00121cc 100644
--- a/02-triangleArea/index.js
+++ b/02-triangleArea/index.js
@@ -1,3 +1,4 @@
-export function triangleArea(base, height) { 
+export function triangleArea(base, height) {
   // your code here
-} 
\ No newline at end of file
+  return (base * height) / 2;
+}
diff --git a/03-maxValue/index.js b/03-maxValue/index.js
index e433b31..93d537a 100644
--- a/03-maxValue/index.js
+++ b/03-maxValue/index.js
@@ -1,4 +1,12 @@
 export function maxValue(values) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  let max = values.reduce(function (a, b) {
+    return Math.max(a, b);
+  }, -Infinity);
+
+  if (values.length === 0) {
+    return 0;
+  } else {
+    return max;
+  }
+}
diff --git a/04-fibonacci/index.js b/04-fibonacci/index.js
index 37c64cc..b32d40a 100644
--- a/04-fibonacci/index.js
+++ b/04-fibonacci/index.js
@@ -1,4 +1,8 @@
 export function fibonacci(value) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  let arr = [0, 1];
+  for (let i = 2; i < value + 1; i++) {
+    arr.push(arr[i - 2] + arr[i - 1]);
+  }
+  return arr[value];
+}
diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..740d231 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,8 @@
 export function isPrime(value) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  for (let i = 2; i < value; i++)
+    if (value % i === 0) {
+      return false;
+    }
+  return value > 1;
+}
diff --git a/06-sum/index.js b/06-sum/index.js
index ebc2ee1..9cd7e9c 100644
--- a/06-sum/index.js
+++ b/06-sum/index.js
@@ -1,4 +1,5 @@
 export function sum(values) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  let sum = values.reduce((sum, number) => sum + number, 0);
+  return sum;
+}
diff --git a/07-sumEven/index.js b/07-sumEven/index.js
index bb1e095..ac5407e 100644
--- a/07-sumEven/index.js
+++ b/07-sumEven/index.js
@@ -1,4 +1,15 @@
 export function sumEven(value) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  let pair = (x) => x % 2 === 0;
+
+  if (value.length === 0) {
+    return 0;
+  } else if (value % 2 === 1) {
+    return 0;
+  } else {
+    let sumOfPairs = value
+      .filter(pair)
+      .reduce((pairs, number) => pairs + number);
+    return sumOfPairs;
+  }
+}
diff --git a/08-isAnagram/index.js b/08-isAnagram/index.js
index 918308a..241bc1f 100644
--- a/08-isAnagram/index.js
+++ b/08-isAnagram/index.js
@@ -1,4 +1,11 @@
 export function isAnagram(word1, word2) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  let str1 = word1.toLowerCase().split("").sort().join("");
+  let str2 = word2.toLowerCase().split("").sort().join("");
+
+  if (str1 === str2) {
+    return true;
+  } else {
+    return false;
+  }
+}
diff --git a/09-mostRepeatedChar/index.js b/09-mostRepeatedChar/index.js
index b113ed8..14b4a30 100644
--- a/09-mostRepeatedChar/index.js
+++ b/09-mostRepeatedChar/index.js
@@ -1,4 +1,17 @@
 export function mostUsedChar(text) {
-    // implementar logica aqui
-    return ""
-}
\ No newline at end of file
+  // implementar logica aqui
+  let arr = text.toLowerCase().split("").sort();
+  let mostRepeated = null;
+  let moreOccurrences = -1;
+
+  let count = 1;
+  for (let i = 1; i <= arr.length; i++) {
+    if (i < arr.length && arr[i] === arr[i - count]) {
+      count++;
+    } else if (count > moreOccurrences) {
+      mostRepeated = arr[i - 1];
+      moreOccurrences = count;
+    }
+  }
+  return `${mostRepeated}`;
+}
diff --git a/10-longestWords/index.js b/10-longestWords/index.js
index a98d2d8..f18a6d4 100644
--- a/10-longestWords/index.js
+++ b/10-longestWords/index.js
@@ -1,4 +1,5 @@
 export function longestWords(words) {
-    // implementar logica aqui
-    
-}
\ No newline at end of file
+  // implementar logica aqui
+  let maxLength = Math.max(...words.map((e) => e.length));
+  return words.filter((e) => e.length === maxLength);
+}