diff --git a/my-script.js b/my-script.js
index 5ac970c..47f1b38 100644
--- a/my-script.js
+++ b/my-script.js
@@ -21,46 +21,82 @@ const greeting = (name) => {
 /**
  * Write a function called `add` that returns the sum of two numbers
  */
-
-
+ const add = function (x,y){
+   return x + y;
+ }
 /**
  * Write a function called `subtract` that returns the difference between two numbers
  */
-
-
+ const subtract = function (x,y){
+   return x - y;
+ }
 /**
  * Write a function called `min` that returns the smaller of two numbers
  */
-
+ const min = function(x,y){
+   if (x < y) {
+     return x;
+   } else {
+     return y;
+   }
+ }
 
 /**
  * Write a function called `max` that returns the larger of two numbers
  */
+const max = function(x,y){
+  if (x > y){
+  return x;
+  } else {
+  return y;
+  }
+}
 
 /**
  * Write a function called `isEven` that takes a single value and
  * returns `true` if it is even and `false` if it is odd
  */
+const isEven = function(x) {
+   return x % 2 === 0;
+ };
 
 
 /**
  * Write a function called `isOdd` that takes a single value and
  * returns `false` if it is even and `true` if it is odd
  */
-
+const isOdd = function(x){
+  if (x % 2 ===1) {
+    return true;
+  } else {
+    return false;
+  }
+}
 
 /**
  * Write a function called `factorial` that takes a single integer and
  * returns the product of the integer and all the integers below it
  */
-
+const factorial = function (x){
+ let result = 1;
+ for (let count = 1; count <= x; count ++){
+  result *=count;
+ }
+ return (result);
+}
 
 /**
  * Write a function called `oddFactorial` that takes a single integer and
  * returns the product of the integer and all the integers below it, but
  * only if they are odd. If the starting number is even, don't include it.
  */
-
+ const oddFactorial = x =>{
+   let result = 1;
+   for (let count = 1; count <= x; count += 2){
+     result *= count;
+   }
+   return(result);
+ };
 
 /**
  * Write a function that solves the Chessboard exercise from chapter two,
@@ -68,8 +104,20 @@ const greeting = (name) => {
  * Instead of printing each line using `console.log()`, build the grid using
  * a single string and return it at the end of the function
  */
-
-
+ let x = '';
+ const chessboard = function (size){
+   for (let line = 1; line <= size; line++) {
+     for (let row = 1; row <= size; row++) {
+       if (line % 2 !== 0) {
+         x += row % 2 !== 0 ? " " : "#";
+       } else {
+         x += row % 2 !== 0 ? "#" : " ";
+       }
+     }
+     x += '\n';
+   }
+  return(x);
+ }
 /*******************************************
  * DO NOT CHANGE ANYTHING BELOW THIS LINE!
  */
@@ -85,4 +133,3 @@ module.exports = {
   oddFactorial: typeof oddFactorial === 'function' ? oddFactorial : null,
   chessboard: typeof chessboard === 'function' ? chessboard : null,
 };
-