diff --git a/assignments/bmi_calculator/bmi_calculator.js b/assignments/bmi_calculator/bmi_calculator.js
index 0cdd351..ffeaa49 100644
--- a/assignments/bmi_calculator/bmi_calculator.js
+++ b/assignments/bmi_calculator/bmi_calculator.js
@@ -1,6 +1,13 @@
 // This function should return the BMI for a person 
 function BMICalculator(mass, height) {
     // Write your code here
+    if(mass>0 && height>0){
+        BMI = mass / (height * height)
+        return BMI
+    }
+    else{
+        return "INVALID INPUT";
+    }
 }
 
 module.exports = BMICalculator;
diff --git a/assignments/can_drive/can_drive.js b/assignments/can_drive/can_drive.js
index f2f1251..9d56844 100644
--- a/assignments/can_drive/can_drive.js
+++ b/assignments/can_drive/can_drive.js
@@ -1,5 +1,16 @@
 function CanDrive(hasDrivingLiscence, isTired, isSober) {
     // Write you code here
+    if(hasDrivingLiscence===false){
+        return "You cannot drive";
+    }
+    else if(hasDrivingLiscence===true  && (isTired===true || isSober===false)){
+        return "You shouldn't drive";
+    }
+    else if(hasDrivingLiscence===true  && (isTired===false || isSober===true)){
+        return "You can drive";
+    }
 }
 
 module.exports = CanDrive;
+
+
diff --git a/assignments/create_object/create_object.js b/assignments/create_object/create_object.js
index 775bc8c..09e0a33 100644
--- a/assignments/create_object/create_object.js
+++ b/assignments/create_object/create_object.js
@@ -1,5 +1,12 @@
 function CreateObject(arr) {
     // Write your code here
+    obj={};
+    arr.forEach((element,index,arr)=>{
+        if(index%2===0){
+            obj[element]=arr[index+1];
+        }
+    });
+    return obj;
 }
 
 module.exports = CreateObject;
diff --git a/assignments/favourite_movie/favourite_movie.js b/assignments/favourite_movie/favourite_movie.js
index a8148eb..cbc089f 100644
--- a/assignments/favourite_movie/favourite_movie.js
+++ b/assignments/favourite_movie/favourite_movie.js
@@ -2,6 +2,12 @@ const movies = [];
 
 function favouriteMovie(operation, movie) {
     // Write your code here
+    if(operation==="add"){
+        movies.push(movie);
+    }
+    else if(operation==="remove"){
+        movies.pop();
+    }
+    return movies;
 }
-
 module.exports = favouriteMovie;
diff --git a/assignments/play_with_array/play_with_array.js b/assignments/play_with_array/play_with_array.js
index 0601c6f..e30cbc2 100644
--- a/assignments/play_with_array/play_with_array.js
+++ b/assignments/play_with_array/play_with_array.js
@@ -7,7 +7,8 @@ function getEven(arr) {
 
         Write you code below
     */
-
+   var res=arr.filter(number=>number%2===0);
+   return res
 }
 
 function multiplyByN(arr, n) {
@@ -18,6 +19,8 @@ function multiplyByN(arr, n) {
             Output: [3,9,13,165]
         Write you code below
     */
+   var mul=arr.map(number=>number*n)
+   return mul
 }
 
 function removeNthElement(arr, n) {
@@ -28,6 +31,8 @@ function removeNthElement(arr, n) {
             Output: [1,3,4,7]
         Write you code below
     */
+   arr.splice(n,1);
+   return arr
 }
 
 module.exports = {
diff --git a/assignments/run_callback/run_callback.js b/assignments/run_callback/run_callback.js
index 04bf43e..6f866b4 100644
--- a/assignments/run_callback/run_callback.js
+++ b/assignments/run_callback/run_callback.js
@@ -1,5 +1,7 @@
 function RunCallback(a, b, cb) {
     // Write you code here, you need to add a and b, pass the result into callback function cb as argument return the result
+    var sum=a+b;
+    return cb(sum);
 }
 
 module.exports = RunCallback;