diff --git a/03-maxValue/index.js b/03-maxValue/index.js
index 101103f..2c7394d 100644
--- a/03-maxValue/index.js
+++ b/03-maxValue/index.js
@@ -1,4 +1,8 @@
 export function maxValue(values) {
   // implementar logica aqui
+  if (values.length == 0) {
+    return 0 
+    }
   return Math.max(...values);
+  
 }
\ No newline at end of file
diff --git a/06-sum/index.js b/06-sum/index.js
index ebc2ee1..a278fe5 100644
--- a/06-sum/index.js
+++ b/06-sum/index.js
@@ -1,4 +1,8 @@
 export function sum(values) {
   // implementar logica aqui
-  
+  let soma = 0
+  for (let index = 0; index < values.lenght; index += 1) {
+    soma = soma + values[index]; 
+  }
+  return soma;
 }
\ No newline at end of file