diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 000000000..eab977d61
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,17 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "pwa-node",
+            "request": "launch",
+            "name": "Launch Program",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${file}"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/exercises/B-hello-world/exercise.js b/exercises/B-hello-world/exercise.js
index b179ee953..a726ed3cf 100644
--- a/exercises/B-hello-world/exercise.js
+++ b/exercises/B-hello-world/exercise.js
@@ -1 +1 @@
-console.log("Hello world");
+console.log(2+2);
diff --git a/exercises/C-variables/exercise.js b/exercises/C-variables/exercise.js
index a6bbb9786..42d22dafc 100644
--- a/exercises/C-variables/exercise.js
+++ b/exercises/C-variables/exercise.js
@@ -1,3 +1,5 @@
 // Start by creating a variable `greeting`
-
+var greeting = "Hello world"
+console.log(greeting);
+console.log(greeting);
 console.log(greeting);
diff --git a/exercises/D-strings/exercise.js b/exercises/D-strings/exercise.js
index 2cffa6a81..538358fb0 100644
--- a/exercises/D-strings/exercise.js
+++ b/exercises/D-strings/exercise.js
@@ -1,3 +1,5 @@
 // Start by creating a variable `message`
-
+message = "this is a string";
+messageType = typeof message;
 console.log(message);
+console.log(messageType);
diff --git a/exercises/E-strings-concatenation/exercise.js b/exercises/E-strings-concatenation/exercise.js
index 2cffa6a81..7087acdbc 100644
--- a/exercises/E-strings-concatenation/exercise.js
+++ b/exercises/E-strings-concatenation/exercise.js
@@ -1,3 +1,8 @@
 // Start by creating a variable `message`
 
-console.log(message);
+var greetingStart = "Hello, my name is ";
+var name = "Daniel";
+
+var greeting = greetingStart + name;
+
+console.log(greeting);
\ No newline at end of file
diff --git a/exercises/F-strings-methods/exercise.js b/exercises/F-strings-methods/exercise.js
index 2cffa6a81..b3e428e30 100644
--- a/exercises/F-strings-methods/exercise.js
+++ b/exercises/F-strings-methods/exercise.js
@@ -1,3 +1,5 @@
 // Start by creating a variable `message`
 
-console.log(message);
+name = "Fareedh";
+nameLength = name.length;
+console.log("My name is " + name + " and it is "+ nameLength + " characters long");
diff --git a/exercises/F-strings-methods/exercise2.js b/exercises/F-strings-methods/exercise2.js
index b4b46943d..ff00a98d1 100644
--- a/exercises/F-strings-methods/exercise2.js
+++ b/exercises/F-strings-methods/exercise2.js
@@ -1,3 +1,5 @@
-const name = " Daniel  ";
+name = "Fareedh";
+nameLength = name.length;
+message = "My name is " + name + " and it is "+ nameLength + " characters long    ";
 
-console.log(message);
+console.log(message.trim());
diff --git a/exercises/G-numbers/exercise.js b/exercises/G-numbers/exercise.js
index 49e7bc00b..63853c923 100644
--- a/exercises/G-numbers/exercise.js
+++ b/exercises/G-numbers/exercise.js
@@ -1 +1,8 @@
 // Start by creating a variables `numberOfStudents` and `numberOfMentors`
+let numberOfMentors = 8;
+let numberOfStudents = 15;
+let totalNumber = numberOfMentors + numberOfStudents;
+
+console.log("Number of Mentors: "+ numberOfMentors);
+console.log("Number of Students: "+ numberOfStudents);
+console.log("Total Number of Student and Mentors: "+ totalNumber);
diff --git a/exercises/I-floats/exercise.js b/exercises/I-floats/exercise.js
index a5bbcd852..847a39452 100644
--- a/exercises/I-floats/exercise.js
+++ b/exercises/I-floats/exercise.js
@@ -1,2 +1,9 @@
 var numberOfStudents = 15;
 var numberOfMentors = 8;
+var totalNumber = numberOfMentors + numberOfStudents;
+
+var mentorPercentage = Math.round((numberOfMentors/totalNumber)*100) + "%";
+var studentPercentage = Math.round((numberOfStudents/totalNumber)*100) + "%";
+
+console.log("Percentage of Students: "+ studentPercentage);
+console.log("Percentage of Mentors: "+ mentorPercentage);
\ No newline at end of file
diff --git a/exercises/J-functions/exercise.js b/exercises/J-functions/exercise.js
index 0ae5850e5..e9ba2f0ef 100644
--- a/exercises/J-functions/exercise.js
+++ b/exercises/J-functions/exercise.js
@@ -1,5 +1,6 @@
 function halve(number) {
   // complete the function here
+  return number/2;
 }
 
 var result = halve(12);
diff --git a/exercises/J-functions/exercise2.js b/exercises/J-functions/exercise2.js
index 82ef5e780..6d216ffc6 100644
--- a/exercises/J-functions/exercise2.js
+++ b/exercises/J-functions/exercise2.js
@@ -1,5 +1,6 @@
 function triple(number) {
   // complete function here
+  return number*3;
 }
 
 var result = triple(12);
diff --git a/exercises/K-functions-parameters/exercise.js b/exercises/K-functions-parameters/exercise.js
index 8d5db5e69..2ae706109 100644
--- a/exercises/K-functions-parameters/exercise.js
+++ b/exercises/K-functions-parameters/exercise.js
@@ -1,6 +1,7 @@
 // Complete the function so that it takes input parameters
-function multiply() {
+function multiply(num1, num2) {
   // Calculate the result of the function and return it
+  return num1*num2;
 }
 
 // Assign the result of calling the function the variable `result`
diff --git a/exercises/K-functions-parameters/exercise2.js b/exercises/K-functions-parameters/exercise2.js
index db7a8904b..e381b0244 100644
--- a/exercises/K-functions-parameters/exercise2.js
+++ b/exercises/K-functions-parameters/exercise2.js
@@ -1,5 +1,7 @@
 // Declare your function first
-
+function divide(num1, num2){
+    return num1/num2;
+}
 var result = divide(3, 4);
 
 console.log(result);
diff --git a/exercises/K-functions-parameters/exercise3.js b/exercises/K-functions-parameters/exercise3.js
index 537e9f4ec..edc9f3162 100644
--- a/exercises/K-functions-parameters/exercise3.js
+++ b/exercises/K-functions-parameters/exercise3.js
@@ -1,5 +1,8 @@
 // Write your function here
-
+function createGreeting(name){
+    return "Hello, my name is "+ name;
+}
 var greeting = createGreeting("Daniel");
 
+
 console.log(greeting);
diff --git a/exercises/K-functions-parameters/exercise4.js b/exercises/K-functions-parameters/exercise4.js
index 7ab44589e..acbb89003 100644
--- a/exercises/K-functions-parameters/exercise4.js
+++ b/exercises/K-functions-parameters/exercise4.js
@@ -1,5 +1,9 @@
 // Declare your function first
+function addition(num1, num2){
+    return num1+num2;
+}
 
 // Call the function and assign to a variable `sum`
+sum = addition(13, 124);
 
 console.log(sum);
diff --git a/exercises/K-functions-parameters/exercise5.js b/exercises/K-functions-parameters/exercise5.js
index 7c5bcd605..9e6e639c8 100644
--- a/exercises/K-functions-parameters/exercise5.js
+++ b/exercises/K-functions-parameters/exercise5.js
@@ -1,5 +1,7 @@
 // Declare your function here
-
+function createLongGreeting(name, age){
+    return "Hello, my name is " + name + " and I'm " + age + " years old.";
+}
 const greeting = createLongGreeting("Daniel", 30);
 
 console.log(greeting);
diff --git a/exercises/L-functions-nested/exercise.js b/exercises/L-functions-nested/exercise.js
index a5d377442..5a3702852 100644
--- a/exercises/L-functions-nested/exercise.js
+++ b/exercises/L-functions-nested/exercise.js
@@ -3,3 +3,15 @@ var mentor2 = "Irina";
 var mentor3 = "Mimi";
 var mentor4 = "Rob";
 var mentor5 = "Yohannes";
+
+function greeting(name){
+    var capital = "Hello, "+ name;
+    return capital.toUpperCase();
+}
+
+
+console.log(greeting(mentor1));
+console.log(greeting(mentor2));
+console.log(greeting(mentor3));
+console.log(greeting(mentor4));
+console.log(greeting(mentor5));
\ No newline at end of file
diff --git a/extra/1-currency-conversion.js b/extra/1-currency-conversion.js
index d82e59480..8a3bc1efd 100644
--- a/extra/1-currency-conversion.js
+++ b/extra/1-currency-conversion.js
@@ -5,7 +5,11 @@
   Write a function that converts a price to USD (exchange rate is 1.4 $ to £)
 */
 
-function convertToUSD() {}
+function convertToUSD(initialPrice) {
+  return Math.round(initialPrice*1.4)+ " $";
+}
+
+console.log(convertToUSD(1000));
 
 /*
   CURRENCY CONVERSION
@@ -15,7 +19,11 @@ function convertToUSD() {}
   They have also decided that they should add a 1% fee to all foreign transactions, which means you only convert 99% of the £ to BRL.
 */
 
-function convertToBRL() {}
+function convertToBRL(toBrazilian) {
+  return Math.round(toBrazilian*5.7 - (toBrazilian*5.7)*(1/100)) + " BRL";
+}
+console.log(convertToBRL(1000));
+
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.
diff --git a/extra/2-piping.js b/extra/2-piping.js
index 9c8ebc76a..22cc030be 100644
--- a/extra/2-piping.js
+++ b/extra/2-piping.js
@@ -16,16 +16,17 @@
   the final result to the variable goodCode
 */
 
-function add() {
-
+function add(num1, num2) {
+  return num1+num2;
 }
 
-function multiply() {
-
+function multiply(num1, num2) {
+  return num1*num2;
 }
 
-function format() {
 
+function format(num) {
+  return "£" + num.toString();
 }
 
 const startingValue = 2;
diff --git a/extra/3-magic-8-ball.js b/extra/3-magic-8-ball.js
index f3adbefa5..30e50656b 100644
--- a/extra/3-magic-8-ball.js
+++ b/extra/3-magic-8-ball.js
@@ -47,7 +47,9 @@
 // and return the answer.
 function shakeBall() {
   //Write your code in here
+  console.log("The ball has been shaken!")
 }
+shakeBall();
 
 /* 
   This function should say whether the answer it is given is
@@ -60,6 +62,7 @@ function shakeBall() {
 */
 function checkAnswer(answer) {
   //Write your code in here
+
 }
 
 /* 
diff --git a/mandatory/1-syntax-errors.js b/mandatory/1-syntax-errors.js
index a10cc9ac2..16f0b0b6d 100644
--- a/mandatory/1-syntax-errors.js
+++ b/mandatory/1-syntax-errors.js
@@ -1,16 +1,18 @@
 // There are syntax errors in this code - can you fix it to pass the tests?
-
-function addNumbers(a b c) {
+//added missing comas. 
+function addNumbers(a, b, c) {
   return a + b + c;
 }
 
 function introduceMe(name, age)
-  return "Hello, my name is " + name "and I am " age + "years old";
+// added + sign
+  return "Hello, my name is " + name "and I am " + age + "years old";
 
-function getTotal(a, b) {
-  total = a ++ b;
 
-  return "The total is total";
+function getTotal(a, b) {
+  total = a + b;
+//took out one of the + signs and also corrected the return syntax
+  return "The total is" + total;
 }
 
 /* 
diff --git a/mandatory/2-logic-error.js b/mandatory/2-logic-error.js
index 9cca7603b..7c1b3643f 100644
--- a/mandatory/2-logic-error.js
+++ b/mandatory/2-logic-error.js
@@ -1,16 +1,19 @@
 // The syntax for this function is valid but it has an error, find it and fix it.
 
 function trimWord(word) {
-  return wordtrim();
+  //Corrected the trim method
+  return word.trim();
 }
 
+
 function getStringLength(word) {
-  return "word".length();
+  //took out the brackets because length method does not take parameters
+  return word.length;
 }
 
 function multiply(a, b, c) {
-  a * b * c;
-  return;
+  //corrected the positioning of the code
+  return a * b * c;
 }
 
 /* 
diff --git a/mandatory/3-function-output.js b/mandatory/3-function-output.js
index 5a953ba60..690e8c97d 100644
--- a/mandatory/3-function-output.js
+++ b/mandatory/3-function-output.js
@@ -1,16 +1,23 @@
 // Add comments to explain what this function does. You're meant to use Google!
 function getRandomNumber() {
+  // This gets a random number between 0 and 1(excluded) and multiplies it by 10
   return Math.random() * 10;
 }
 
 // Add comments to explain what this function does. You're meant to use Google!
 function combine2Words(word1, word2) {
+  //this function joins two words that have been entered as parameters
   return word1.concat(word2);
 }
 
 function concatenate(firstWord, secondWord, thirdWord) {
   // Write the body of this function to concatenate three words together.
   // Look at the test case below to understand what this function is expected to return.
+  //we could either return them with spaces between them like this ;
+  //return firstWord + " " + secondWord + " " + thirdWord;
+  //OR we could use the concat method to join the three strings(Here we add the spaces manually as we the parameters)
+  return firstWord.concat(secondWord).concat(thirdWord);
+
 }
 
 /* 
diff --git a/mandatory/4-tax.js b/mandatory/4-tax.js
index ba77c7ae2..75faf94ef 100644
--- a/mandatory/4-tax.js
+++ b/mandatory/4-tax.js
@@ -5,7 +5,9 @@
   Sales tax is 20% of the price of the product.
 */
 
-function calculateSalesTax() {}
+function calculateSalesTax(price) {
+  return price + ((20/100)*price);
+}
 
 /*
   CURRENCY FORMATTING
@@ -17,7 +19,11 @@ function calculateSalesTax() {}
   Remember that the prices must include the sales tax (hint: you already wrote a function for this!)
 */
 
-function addTaxAndFormatCurrency() {}
+function addTaxAndFormatCurrency(price) {
+  var transform = "£" + parseFloat(calculateSalesTax(price)).toFixed(2);
+  return transform;
+}
+console.log(addTaxAndFormatCurrency(34));
 
 /* 
 ===================================================