diff --git a/src/index.js b/src/index.js
index 47844e2..3cc66de 100644
--- a/src/index.js
+++ b/src/index.js
@@ -3,3 +3,140 @@ function add(a, b){
 }
 
 exports.add = add;
+
+// Q1 longest string
+function longestString(array){
+  return array.reduce(function(a, b) {return a.length > b.length? a : b;});
+ }
+
+ // a starts as the first elements, you then compare 'a' with the next element 'b', if 'b' is bigger, 'b' becomes 'a'.
+
+ exports.longestString = longestString;
+
+ //Q2 l337
+function replaceInstances(string){
+  const arr = string.split('');
+  arr.replace('i', '1');
+  arr.replace('l', '1');
+  arr.replace('e','3');
+  arr.replace('a','4');
+  arr.replace('s','5');
+  arr.replace('g','6');
+  arr.replace('t','7');
+  return arr;
+}
+
+exports.replaceInstances = replaceInstances;
+
+//Q3 - Unique String
+function uniqueStrings(array){
+  const newArr = array.filter(function(element, index){
+    return array.indexOf(element) == index;
+  });
+  return newArr;
+}
+exports.uniqueStrings = uniqueStrings;
+
+// Q4 - developer languages
+function Developer(name, languages){
+  this.name = name;
+  this.languages = languages;
+}
+
+// Q5 - inheritance
+Developer.prototype.learnLanguage = function(language){
+  this.languages.push(language);
+  this.languages = uniqueStrings(this.languages);
+}
+
+exports.Developer = Developer;
+
+//Q6 - Garden
+function Garden(plants){
+  for(var prop in plants){
+    if (plants.hasOwnProperty(prop)){
+      this[prop] = plants[prop];
+    }
+  }
+  // Object.keys(plants).forEach((key) => {
+  //   if(plants.hasOwnProperty(key)){
+  //     this[key] = plants[key];
+  //   }
+  // })
+}
+// exports.Garden = Garden;
+
+//Q7 - extend
+Garden.prototype.plant = function(newPlants){
+  // for (let key in newPlants){
+  //   this[key] = newPlants[key];
+  // };
+  Object.keys(newPlants).forEach((key)=>{
+    this[key] = newPlants[key];
+  })
+}
+// exports.Garden = Garden;
+
+//Q8 - harvest
+Garden.prototype.harvest = function(plantHarvest){
+  Object.keys(plantHarvest).forEach((key) =>{
+    this[key] -= plantHarvest[key];
+    if (this[key] === 0){
+      delete this[key];
+    }
+  })
+}
+exports.Garden = Garden;
+
+function concat(array){
+  const newArr = array.filter(function(el){
+    return typeof el !== 'number';
+  })
+  return newArr.join('');
+}
+
+exports.concat = concat;
+
+//Q9 - negative numbers only
+function negativeOnly(array){
+  const negArr = array.filter(function(num){
+    return num < 0;
+  })
+  return negArr;
+}
+
+exports.negativeOnly = negativeOnly;
+
+//Q10 - camelise
+function camelise(string){
+  const arr = string.split(' ');
+    const newArr = arr.map(function(str){
+      return str.charAt(0).toUpperCase() + str.slice(1)      
+  })
+  .join('');
+  const newNewArr = newArr.charAt(0).toLowerCase() + newArr.slice(1);
+  return newNewArr;
+}
+
+exports.camelise = camelise;
+
+// ----------- for comparison, oliver's code ------------
+function camelise(string) {
+  return string
+    .split(" ")
+    .map(function(str, i) {
+      if (i === 0) return str.toLowerCase();
+      return str.charAt(0).toUpperCase() + str.slice(1);
+    })
+    .join("");
+}
+// exports.camelise = camelise;
+
+//Q11 - merging
+function merging(arr){
+  const sorted = arr.slice().sort(function(a,b){
+    return Object.keys(a).length < Object.keys(b).length;
+  })
+  return Object.assign({}, ...sorted);
+}
+exports.merging = merging;
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diff --git a/test/index.test.js b/test/index.test.js
index b1f6772..5d57477 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -5,3 +5,84 @@ test('Addition', function(){
   const result = functions.add(2, 3);
   expect(result).toBe(expected);
 });
+
+//Q1 - longest string
+test('Longest String', function(){
+  const expected = 'panda';
+  const result = functions.longestString(['cat', 'dog', 'bear', 'panda']);
+  expect(result).toBe(expected);
+});
+
+//Q2
+test('l337', function(){
+  const expected = 'C0n57ruc70r';
+  const result = functions.replaceInstances("Constructor");
+  expect(result).toBe(expected);
+});
+
+// Q3 - unique string
+test('Unique Strings', function(){
+  const expected = ['a','1','4','2'];
+  const result = functions.uniqueStrings(['a','1','4','4','2','a']);
+  expect(result).toEqual(expected);
+})
+
+test('Developer', function(){
+  const expected = {name: 'Harry', languages: ['Python', 'JavaScript', 'Ruby']};
+  const result = new functions.Developer('Harry', ['Python', 'JavaScript', 'Ruby']);
+  expect(result).toEqual(expected);
+});
+
+test('Learn Language', function(){
+  const expected = ['Python', 'JavaScript', 'Ruby', 'PHP'];
+  const phoebe = new functions.Developer('Phoebe', ['Python', 'JavaScript', 'Ruby']);
+  phoebe.learnLanguage('PHP');
+  const result = phoebe.languages;
+  expect(result).toEqual(expected);
+});
+
+test('Garden'), function(){
+  const expected = {tulip: 15, rosebush: 3, appletree: 1};
+  const result = new functions.Garden({tulip: 15, rosebush: 3, appletree: 1});
+  expect(result).toEqual(expected);
+}
+
+test('new plant', function(){
+  const expected = {tulip: 15, rosebush: 3, appletree: 1, poppy: 6};
+  const newGarden = new functions.Garden({tulip: 15, rosebush: 3, appletree: 1});
+  newGarden.plant({poppy: 6});
+  const result = newGarden;
+  expect(result).toEqual(expected);
+});
+
+test('Harvest', function(){
+  const expected = {tulip: 9, rosebush:1};
+  const newGarden = new functions.Garden({tulip: 15, rosebush: 3, appletree: 1});
+  newGarden.harvest({tulip: 6, rosebush: 2, appletree: 1});
+  const result = newGarden;
+  expect(result).toEqual(expected);
+})
+
+test('concat', function(){
+  const expected = 'constructorlabs';
+  const result = functions.concat(['constructor', 'labs', 1]);
+  expect(result).toEqual(expected);
+})
+
+test('negativeOnly', function(){
+  const expected = [-5, -10, -123];
+  const result = functions.negativeOnly([1, 3, -5, -10, 46, -123, 122]);
+  expect(result).toEqual(expected);
+})
+
+test('camelise', function(){
+  const expected = 'makeMeACamel';
+  const result = functions.camelise('make me a camel');
+  expect(result).toBe(expected);
+})
+
+test.only('merging', function(){
+  const expected = {a: 6, b: 12, c: 19} ;
+  const result = functions.merging([{a: 6}, {a: 7, b: 12}, {a: 2, b: 5, c: 19}]);
+  expect(result).toEqual(expected);
+})
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