diff --git a/src/functions-and-arrays.js b/src/functions-and-arrays.js
index 3a7dbec41..f28fde35a 100644
--- a/src/functions-and-arrays.js
+++ b/src/functions-and-arrays.js
@@ -1,21 +1,66 @@
 // Iteration #1: Find the maximum
-function maxOfTwoNumbers() {}
+function maxOfTwoNumbers(num1, num2) {
+  if (num1>num2){
+    return num1
+  }
+    else if (num1<num2) {
+      return num2
+    }
+      else {
+        return [num1,num2]
+      }
+}
 
 
 
 // Iteration #2: Find longest word
 const words = ['mystery', 'brother', 'aviator', 'crocodile', 'pearl', 'orchard', 'crackpot'];
 
-function findLongestWord() {}
+function findLongestWord(words) {
+  if (words.length===0){
+    return null;
+  }
+    else if (words.length===1){
+    return words[0];
+    }
+      else {
+        var longitudInicial=0;
+        var palabraMasLarga="";
 
+      for (var i=0; i<words.length; i++){
+      longitudActual = words[i].length;
+        if (longitudActual>longitudInicial){
+        longitudInicial = longitudActual
+        palabraMasLarga = words [i]
+      } 
+      }
+      return palabraMasLarga
+      }
+    }
 
 
-// Iteration #3: Calculate the sum
-const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];
 
-function sumNumbers() {}
 
+// Iteration #3: Calculate the sum
+const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];
 
+function sumNumbers(numbers) {
+  if (numbers.length === 0){
+    return 0;
+  }
+  else if (numbers.length === 1){
+    return numbers [0]
+  }
+  else {
+
+  var suma =0
+  for (var i=0; i<numbers.length; i++){
+    suma += numbers [i] 
+  }
+  return suma
+}
+}
+console.log (sumNumbers(numbers));
 
 // Iteration #3.1 Bonus:
 function sum() {}