diff --git a/src/functions-and-arrays.js b/src/functions-and-arrays.js
index 2fcd81e6e..b47563b58 100644
--- a/src/functions-and-arrays.js
+++ b/src/functions-and-arrays.js
@@ -1,4 +1,11 @@
 // Find the maximum
+function maxOfTwoNumbers(num1, num2) {
+  if (num1 > num2) {
+    return num1;
+  } else {
+    return num2;
+  }
+}
 
 // Finding Longest Word
 var words = [
@@ -11,14 +18,57 @@ var words = [
   'crackpot'
 ];
 
+function findLongestWord(words) {
+  var longestWord = "";
+  if (words.length === 0) {
+    return undefined;
+  }
+  for (var i = 0; i < words.length; i++) {
+    if (longestWord.length < words[i].length) {
+      longestWord = words[i];
+    } else {
+      continue;
+    }
+  }
+  return longestWord;
+}
+
 // Calculating a Sum
 
 var numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];
-
+/*
+function sumArray(numbers) {
+  var sum = 0;
+  numbers.forEach(function(num) {
+    sum += num;
+  })
+};
+*/
+function sumArray(numbers) {
+  var sum = 0;
+  if (numbers.length === 0) {
+    return 0;
+  }
+  for(var i = 0; i < numbers.length; i++) {
+    sum += numbers[i];
+  }
+  return sum;
+};
 // Calculate the Average
 
 var numbersAvg = [2, 6, 9, 10, 7, 4, 1, 9];
 
+function averageNumbers (numbers) {
+  var sum = 0;
+  if (numbers.length === 0) {
+    return undefined;
+  } 
+  for (var i=0; i < numbers.length; i++) {
+    sum += numbers[i];
+  }
+  return (sum / numbers.length);
+}
+
 // Array of Strings
 var wordsArr = [
   'seat',
@@ -33,6 +83,17 @@ var wordsArr = [
   'palace'
 ];
 
+function averageWordLength (wordsArr) {
+  if (wordsArr.length === 0) {
+    return undefined;
+  }
+  var sumLetters = 0;
+  for (var i = 0; i < wordsArr.length; i++) {
+    sumLetters +=  wordsArr[i].length;
+  }
+  return (sumLetters / wordsArr.length)
+}
+
 // Unique Arrays
 var wordsUnique = [
   'crab',
@@ -48,6 +109,19 @@ var wordsUnique = [
   'bring'
 ];
 
+function uniquifyArray (arr){
+  if (arr.length === 0) {
+    return undefined;
+  }
+  var newArr = [];
+  for (var i = arr.length-1; i >= 0; i--) {
+    if (arr.indexOf(arr[i]) === i) {
+      newArr.unshift(arr[i])
+    } 
+  }
+  return newArr;
+}
+
 // Finding Elements
 var wordsFind = [
   'machine',
@@ -60,6 +134,18 @@ var wordsFind = [
   'disobedience'
 ];
 
+function doesWordExist(arr, word) {
+  if (arr.length === 0) {
+    return false;
+  }
+  for(var i = 0; i < wordsFind.length; i++) {
+    if (arr[i] === word) {
+      return true;
+    }
+  }
+  return false;
+}
+
 // Counting Repetion
 var wordsCount = [
   'machine',
@@ -74,6 +160,20 @@ var wordsCount = [
   'disobedience',
   'matter'
 ];
+
+function howManyTimes(arr, word) {
+  if (arr.length === 0) {
+    return false;
+  }
+  counter = 0;
+  for(var i = 0; i < arr.length; i++) {
+    if (arr[i] === word) {
+      counter++;
+    }
+  }
+  return counter;
+}
+
 // Bonus Quest
 
 var matrix = [