diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
index 0acfc78d..c1200c80 100644
--- a/1-exercises/A-undefined/exercise.js
+++ b/1-exercises/A-undefined/exercise.js
@@ -12,25 +12,27 @@
 // Example 1
 let a;
 console.log(a);
-
+// a has no value assigned
 
 // Example 2
 function sayHello() {
     let message = "Hello";
 }
+// the function sayHello is not returned
 
 let hello = sayHello();
 console.log(hello);
-
+// the function is not returning anything
 
 // Example 3
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
-
+// the user parameter does not pass anything
 sayHelloToUser();
 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// there is no index 3 in the array
\ No newline at end of file
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
index b459888f..cf4ca85b 100644
--- a/1-exercises/B-while-loop/exercise.js
+++ b/1-exercises/B-while-loop/exercise.js
@@ -6,6 +6,14 @@
 */
 
 function evenNumbers(n) {
+    const arr = []
+    let i = 0
+    
+    while (i < n) {
+        arr.push(i * 2);
+        i++;
+    }
+    console.log(arr.join(', '));
     // TODO
 }
 
diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
index d584cd75..9d08be2f 100644
--- a/1-exercises/C-while-loop-with-array/exercise.js
+++ b/1-exercises/C-while-loop-with-array/exercise.js
@@ -17,6 +17,15 @@ const BIRTHDAYS = [
 ];
 
 function findFirstJulyBDay(birthdays) {
+    let i = 0;
+
+    while (i < birthdays.length - 1) {
+        let birthdayCheck = birthdays[i];
+        if (birthdayCheck.startsWith("July")) {
+            return birthdayCheck;
+        }
+        i++;
+    }
     // TODO
 }
 
diff --git a/1-exercises/D-do-while/exercise.js b/1-exercises/D-do-while/exercise.js
index f10d0764..31e19082 100644
--- a/1-exercises/D-do-while/exercise.js
+++ b/1-exercises/D-do-while/exercise.js
@@ -8,6 +8,14 @@
 
 function evenNumbersSum(n) {
     // TODO
+    let sumNum = 0;
+    let i = 0;
+
+    do {
+        sumNum = sumNum + i * 2;
+        i++;
+    } while (i < n);
+    return sumNum;
 }
 
 console.log(evenNumbersSum(3)); // should output 6
diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
index db5fac64..41b9c720 100644
--- a/1-exercises/E-for-loop/exercise1.js
+++ b/1-exercises/E-for-loop/exercise1.js
@@ -6,9 +6,12 @@
 
 
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
-while(i < 26) {
-    console.log(String.fromCharCode(97 + i));
-    i++;
-}
+// let i = 0;
+// while(i < 26) {
+//     console.log(String.fromCharCode(97 + i));
+//     i++;
+// }
 // The output shouldn't change.
+for (let i = 0; i < 26 ; i++) {
+    console.log(String.fromCharCode(97 + i));
+}
\ No newline at end of file
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
index 081002b2..a4b4b1a4 100644
--- a/1-exercises/E-for-loop/exercise2.js
+++ b/1-exercises/E-for-loop/exercise2.js
@@ -27,6 +27,9 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
+for (let i = 0; i < WRITERS.length; i++) {
+    console.log(`${WRITERS[i]} is ${AGES[i]} years old`)
+}
 
 /*
 The output should look something like this:
diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
index 65585c6a..a194fb85 100644
--- a/1-exercises/F-for-of-loop/exercise.js
+++ b/1-exercises/F-for-of-loop/exercise.js
@@ -11,6 +11,12 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
+for (const station of tubeStations) {
+    console.log(station.toUpperCase());
+}
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+for (const letter of str) {
+    console.log(letter.toUpperCase());
+}
\ No newline at end of file
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
index dcc2bdb0..dcc7e650 100644
--- a/2-mandatory/1-weather-report.js
+++ b/2-mandatory/1-weather-report.js
@@ -13,6 +13,12 @@
 
 function getTemperatureReport(cities) {
     // TODO
+    let arrTemp = [];
+
+    for (let city of cities) {
+        arrTemp.push(`The temperature in ${city} is ${temperatureService(city)} degrees`);
+    }
+    return arrTemp;
 }
 
 
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
index 10aab37d..814ae89e 100644
--- a/2-mandatory/2-retrying-random-numbers.js
+++ b/2-mandatory/2-retrying-random-numbers.js
@@ -11,8 +11,15 @@ function generateRandomNumber() {
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
+    let number = 0;
+    do {
+        number = generateRandomNumber();
+    } while (number <= 50);
+
+    return number;
 }
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("Returned value should always be greater than 50", () => {
diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
index 2ce6fb73..c5bf8eee 100644
--- a/2-mandatory/3-financial-times.js
+++ b/2-mandatory/3-financial-times.js
@@ -6,6 +6,15 @@
 */
 function potentialHeadlines(allArticleTitles) {
     // TODO
+
+    let titles = [];
+
+    for (const title in allArticleTitles) {
+        if (titles.length <= 65) {
+            titles.push(title);
+        }
+    }
+    return titles;  
 }
 
 /*
@@ -15,6 +24,17 @@ function potentialHeadlines(allArticleTitles) {
 */
 function titleWithFewestWords(allArticleTitles) {
     // TODO
+    let fewWords = allArticleTitles[0];
+    let words = allArticleTitles[0].split(" ").length;
+
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        let theWordArrapy = allArticleTitles[i].split(" ").length;
+        if (theWordArray < words) {
+            fewWords = allArticleTitles[i];
+        }
+        words = theWordArrapy;
+    }
+    return fewWords;
 }
 
 /*
@@ -24,6 +44,7 @@ function titleWithFewestWords(allArticleTitles) {
 */
 function headlinesWithNumbers(allArticleTitles) {
     // TODO
+    
 }
 
 /*
diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
deleted file mode 100644
index 31f8052c..00000000
--- a/3-extra/1-factorial.js
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
-    In maths, the factorial of an integer (written as n!) is the product of an integer, and all the integers below it (not including zero).
-    See: https://en.wikipedia.org/wiki/Factorial
-    For example,
-        3! is 6 (because 3 * 2 * 1 = 6)
-        5! is 120 (because 5 * 4 * 3 * 2 * 1 = 120)
-    
-    Using a loop, complete the function below so it returns the factorial of the number being passed in. 
-*/
-
-function factorial(input) {
-    // TODO
-}
-
-/* ======= TESTS - DO NOT MODIFY ===== */
-
-test("3! should be 6", () => {
-    expect(factorial(3)).toEqual(6);
-});
-
-test("5! should be 120", () => {
-    expect(factorial(5)).toEqual(120);
-});
-
-test("10! should be 3628800", () => {
-    expect(factorial(10)).toEqual(3628800);
-});
diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
deleted file mode 100644
index ee57960f..00000000
--- a/3-extra/2-array-of-objects.js
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
-    This exercise includes an array of objects. You can read more about objects here: https://javascript.info/object
-
-    Imagine you're working for an online store selling books (like Amazon).
-    Below, we have an array of book objects.
-    Each object contains the title of the book, the genre, and a rating based on user reviews.
-    
-    We want to find the title of the highest rated book in each genre to showcase on our home page.
-    Implement a function which takes the array of books as a parameter, and returns an array of book titles.
-    Each title in the resulting array should be the highest rated book in its genre.
-*/
-
-function getHighestRatedInEachGenre(books) {
-    // TODO
-}
-
-
-/* ======= Book data - DO NOT MODIFY ===== */
-const BOOKS = [
-    {
-        title: "The Lion, the Witch and the Wardrobe",
-        genre: "children",
-        rating: 4.7
-    },
-    {
-        title: "Sapiens: A Brief History of Humankind",
-        genre: "non-fiction",
-        rating: 4.7
-    },
-    {
-        title: "Nadiya's Fast Flavours",
-        genre: "cooking",
-        rating: 4.7
-    },
-    {
-        title: "Harry Potter and the Philosopher's Stone",
-        genre: "children",
-        rating: 4.8
-    },
-    {
-        title: "A Life on Our Planet",
-        genre: "non-fiction",
-        rating: 4.8
-    },
-    {
-        title: "Dishoom: The first ever cookbook from the much-loved Indian restaurant",
-        genre: "cooking",
-        rating: 4.85
-    },
-    {
-        title: "Gangsta Granny Strikes Again!",
-        genre: "children",
-        rating: 4.9
-    },
-    {
-        title: "Diary of a Wimpy Kid",
-        genre: "children",
-        rating: 4.6
-    },
-    {
-        title: "BOSH!: Simple recipes. Unbelievable results. All plants.",
-        genre: "cooking",
-        rating: 4.6
-    },
-    {
-        title: "The Book Your Dog Wishes You Would Read",
-        genre: "non-fiction",
-        rating: 4.85
-    },
-]
-
-
-/* ======= TESTS - DO NOT MODIFY ===== */
-test("should return the highest rated book in each genre", () => {
-    expect(new Set(getHighestRatedInEachGenre(BOOKS))).toEqual(new Set(
-        [
-            "The Book Your Dog Wishes You Would Read",
-            "Gangsta Granny Strikes Again!",
-            "Dishoom: The first ever cookbook from the much-loved Indian restaurant"
-        ]
-    ));
-});
\ No newline at end of file
diff --git a/3-extra/3-fibonacci.js b/3-extra/3-fibonacci.js
deleted file mode 100644
index 9ef9aec7..00000000
--- a/3-extra/3-fibonacci.js
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
-    The Fibonacci Sequence is a famous sequence of numbers. Read more here: https://www.mathsisfun.com/numbers/fibonacci-sequence.html
-    
-    The sequence starts with 0 and 1. Each number after that, is the sum of the previous 2 numbers in the sequence.
-    So the third number in the sequence is 1, because 0 + 1 = 1. 
-        Now we have 0, 1, 1.
-    The fourth number in the sequence is 2, because 1 + 1 = 2. (the last 2 numbers in the sequence were 1 and 1)
-        Now we have 0, 1, 1, 2.
-    The fifth number in the sequence is 3, because 1 + 2 = 3. (the last 2 numbers in the sequence were 1 and 2)
-    And so on... If we go a bit further the sequence looks like 0, 1, 1, 2, 3, 5, 8, 13,....
-
-    Can you implement a function that will generate the first n numbers in this sequence (starting with 0 and 1)?
-        - the input n will be passed in to the function as an argument, and will be a number greater than 2
-*/
-
-function generateFibonacciSequence(n) {
-    // TODO
-}
-
-/* ======= TESTS - DO NOT MODIFY ===== */
-test("should return the first 10 numbers in the Fibonacci Sequence", () => {
-    expect(generateFibonacciSequence(10)).toEqual(
-        [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
-    );
-});
-
-test("should return the first 5 numbers in the Fibonacci Sequence", () => {
-    expect(generateFibonacciSequence(5)).toEqual(
-        [0, 1, 1, 2, 3]
-    );
-});
-
-test("should return the first 15 numbers in the Fibonacci Sequence", () => {
-    expect(generateFibonacciSequence(15)).toEqual(
-        [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377]
-    );
-});
\ No newline at end of file