diff --git a/01-greeting/index.js b/01-greeting/index.js
index 8f551af..c1211f1 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..07023c6 100644
--- a/02-triangleArea/index.js
+++ b/02-triangleArea/index.js
@@ -1,3 +1,4 @@
 export function triangleArea(base, height) { 
-  // your code here
+  
+  return(base * height) /2;
 } 
\ No newline at end of file
diff --git a/03-maxValue/index.js b/03-maxValue/index.js
index e433b31..0a6707d 100644
--- a/03-maxValue/index.js
+++ b/03-maxValue/index.js
@@ -1,4 +1,17 @@
 export function maxValue(values) {
-  // implementar logica aqui
-  
-}
\ No newline at end of file
+
+  const values = [4, 6, 12, 5];
+  const values = [9, 234, 312, 999, 21, 2311];
+  const values = [533, 234, 23423, 32, 432];
+  const values = [5, 4, 3, 2, 1];
+  const values = [-1, -5, -10, -45];
+  const values = [];
+
+  const maxValue = values.reduce(function(prev, current) { 
+    return prev > current ? prev : current; 
+  });
+  return Math.max(values);
+
+}
+
+
diff --git a/05-isPrime/index.js b/05-isPrime/index.js
index ec9c4ac..e533dae 100644
--- a/05-isPrime/index.js
+++ b/05-isPrime/index.js
@@ -1,4 +1,4 @@
 export function isPrime(value) {
-  // implementar logica aqui
+ 
   
 }
\ No newline at end of file
diff --git a/06-sum/index.js b/06-sum/index.js
index ebc2ee1..67c25f2 100644
--- a/06-sum/index.js
+++ b/06-sum/index.js
@@ -1,4 +1,8 @@
 export function sum(values) {
-  // implementar logica aqui
-  
+  var sum = 0;
+
+  for(var i = 0; i < values.length; i++) {
+    sum += values[i];
+  }
+  return sum
 }
\ No newline at end of file