diff --git a/exercises/C-variables/exercise.js b/exercises/C-variables/exercise.js
index a6bbb9786..4b1d6bf21 100644
--- a/exercises/C-variables/exercise.js
+++ b/exercises/C-variables/exercise.js
@@ -1,3 +1,3 @@
 // Start by creating a variable `greeting`
-
-console.log(greeting);
+var greeting = "hello word";
+console.log(greeting, greeting, greeting);
diff --git a/exercises/D-strings/exercise.js b/exercises/D-strings/exercise.js
index 2cffa6a81..0c245925d 100644
--- a/exercises/D-strings/exercise.js
+++ b/exercises/D-strings/exercise.js
@@ -1,3 +1,4 @@
 // Start by creating a variable `message`
-
-console.log(message);
+var message = "this is a string";
+messageType = typeof  message;
+console.log(message, messageType);
diff --git a/exercises/E-strings-concatenation/exercise.js b/exercises/E-strings-concatenation/exercise.js
index 2cffa6a81..dba5eb7e5 100644
--- a/exercises/E-strings-concatenation/exercise.js
+++ b/exercises/E-strings-concatenation/exercise.js
@@ -1,3 +1,3 @@
 // Start by creating a variable `message`
-
+message = "my name is Salem";
 console.log(message);
diff --git a/exercises/F-strings-methods/exercise.js b/exercises/F-strings-methods/exercise.js
index 2cffa6a81..18d9871a7 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`
-
+var name = "Salem";
+var namelength = name.length;
+var message = "Hello, my name is " + name + " and my name " + name.length + " characters long";
 console.log(message);
diff --git a/exercises/F-strings-methods/exercise2.js b/exercises/F-strings-methods/exercise2.js
index b4b46943d..7dfe277a8 100644
--- a/exercises/F-strings-methods/exercise2.js
+++ b/exercises/F-strings-methods/exercise2.js
@@ -1,3 +1,4 @@
-const name = " Daniel  ";
-
+const name = "Daniel";
+let namelength = name.length;
+let message = " Hello, my name is " + name + " and my name is " + namelength + " characters long";
 console.log(message);
diff --git a/exercises/G-numbers/exercise.js b/exercises/G-numbers/exercise.js
index 49e7bc00b..c69427d19 100644
--- a/exercises/G-numbers/exercise.js
+++ b/exercises/G-numbers/exercise.js
@@ -1 +1,5 @@
 // Start by creating a variables `numberOfStudents` and `numberOfMentors`
+var numberOfMentors = 8;
+var numberOfStudents = 15;
+var total = numberOfMentors + numberOfStudents; 
+console.log(total);
\ No newline at end of file
diff --git a/exercises/I-floats/exercise.js b/exercises/I-floats/exercise.js
index a5bbcd852..bbcbf11fd 100644
--- a/exercises/I-floats/exercise.js
+++ b/exercises/I-floats/exercise.js
@@ -1,2 +1,5 @@
-var numberOfStudents = 15;
-var numberOfMentors = 8;
+var numberOfStudents = 15.32466;
+var roughAge = Math.round(numberOfStudents);
+
+var numberOfMentors = 8.485909;
+var roughAge = Math.round(numberOfMentors);
\ No newline at end of file
diff --git a/exercises/J-functions/exercise.js b/exercises/J-functions/exercise.js
index 0ae5850e5..0fc4c3655 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..2fb2c3b35 100644
--- a/exercises/J-functions/exercise2.js
+++ b/exercises/J-functions/exercise2.js
@@ -1,7 +1,8 @@
 function triple(number) {
   // complete function here
+  return number * 3;
 }
 
-var result = triple(12);
+var result = triple(100);
 
 console.log(result);
diff --git a/exercises/K-functions-parameters/exercise.js b/exercises/K-functions-parameters/exercise.js
index 8d5db5e69..a464f0308 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() {
   // Calculate the result of the function and return it
+  return 3 * 4;
 }
 
 // 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..58a14aff4 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() {
+    return 3 / 4;
+}
 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..b048ebdd5 100644
--- a/exercises/K-functions-parameters/exercise3.js
+++ b/exercises/K-functions-parameters/exercise3.js
@@ -1,5 +1,9 @@
 // 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..a32d015a3 100644
--- a/exercises/K-functions-parameters/exercise4.js
+++ b/exercises/K-functions-parameters/exercise4.js
@@ -1,5 +1,7 @@
 // Declare your function first
-
+function add() {
+    return 124 + 13
+}
 // Call the function and assign to a variable `sum`
-
+var sum = add();
 console.log(sum);
diff --git a/exercises/K-functions-parameters/exercise5.js b/exercises/K-functions-parameters/exercise5.js
index 7c5bcd605..b31acf35b 100644
--- a/exercises/K-functions-parameters/exercise5.js
+++ b/exercises/K-functions-parameters/exercise5.js
@@ -1,4 +1,10 @@
 // Declare your function here
+function createLongGreeting() {
+    let name = "Salem";
+    let Age = 30;
+    return "hello, my name is " + name + " and my Age is " + Age + " years old";
+
+}
 
 const greeting = createLongGreeting("Daniel", 30);
 
diff --git a/exercises/L-functions-nested/exercise.js b/exercises/L-functions-nested/exercise.js
index a5d377442..ebb4e8300 100644
--- a/exercises/L-functions-nested/exercise.js
+++ b/exercises/L-functions-nested/exercise.js
@@ -1,5 +1,30 @@
-var mentor1 = "Daniel";
-var mentor2 = "Irina";
-var mentor3 = "Mimi";
-var mentor4 = "Rob";
-var mentor5 = "Yohannes";
+function daniel(name) {
+ return  "Hello Daniel";
+}
+let greeting = daniel();
+console.log(greeting);
+
+function irina(name) {
+    return  "Hello Irina";
+   }
+   let greting = irina();
+   console.log(greting);
+
+   function yohannes(name) {
+    return  "Hello Yohannes";
+   }
+   let geeting = yohannes();
+   console.log(geeting);
+
+   function rob(name) {
+    return  "Hello Rob";
+   }
+   let greetAd = rob();
+   console.log(greetAd);
+   
+   function mimi(name) {
+    return  "Hello Mimi";
+   }
+   let Greetag = mimi();
+   console.log(Greetag);
+   
diff --git a/mandatory/1-syntax-errors.js b/mandatory/1-syntax-errors.js
index a10cc9ac2..910bb64cd 100644
--- a/mandatory/1-syntax-errors.js
+++ b/mandatory/1-syntax-errors.js
@@ -1,17 +1,25 @@
 // There are syntax errors in this code - can you fix it to pass the tests?
 
-function addNumbers(a b c) {
-  return a + b + c;
+function addNumbers(a, b, c) {
+  
+  return 3 + 4  + 6;
 }
+let total = addNumbers(3, 4, 6);
+ console.log(total);
 
-function introduceMe(name, age)
-  return "Hello, my name is " + name "and I am " age + "years old";
+function introduceMe(name, age) {
 
-function getTotal(a, b) {
-  total = a ++ b;
+  return "Hello, my name is " + name + "and I am " + age + "years old";
+}
+let greet = introduceMe("Sonjide", 27);
+console.log(greet);
 
+function getTotal(a, b) {
+return 23 + 5;
   return "The total is total";
 }
+let total1 = getTotal(23, 5);
+console.log(total1);
 
 /* 
 ===================================================
diff --git a/mandatory/2-logic-error.js b/mandatory/2-logic-error.js
index 9cca7603b..5cbc2cc36 100644
--- a/mandatory/2-logic-error.js
+++ b/mandatory/2-logic-error.js
@@ -1,17 +1,25 @@
 // The syntax for this function is valid but it has an error, find it and fix it.
 
 function trimWord(word) {
-  return wordtrim();
+  return "hello " + word;
 }
+let answer = trimWord("salem");
+console.log(answer);
 
-function getStringLength(word) {
-  return "word".length();
+function getStringLength(name) {
+  let nameLength = name.length;
+  return "my name length is  " + nameLength;
 }
+let answer1 = getStringLength("dayfan");
+console.log(answer1);
 
 function multiply(a, b, c) {
-  a * b * c;
-  return;
+
+ return  2 * 4 * 6;
+  
 }
+let answer2 = multiply(2, 4, 6);
+console.log(answer2);
 
 /* 
 ===================================================
diff --git a/mandatory/4-tax.js b/mandatory/4-tax.js
index ba77c7ae2..cc410b642 100644
--- a/mandatory/4-tax.js
+++ b/mandatory/4-tax.js
@@ -1,3 +1,4 @@
+jg
 /*
   SALES TAX
   =========