diff --git a/my-script.js b/my-script.js
index 5ac970c..12d2014 100644
--- a/my-script.js
+++ b/my-script.js
@@ -21,46 +21,86 @@ const greeting = (name) => {
 /**
  * Write a function called `add` that returns the sum of two numbers
  */
-
-
+function add(number1, number2) {
+  return (number1 + number2);
+}
+console.log(add(2, 2))
 /**
  * Write a function called `subtract` that returns the difference between two numbers
  */
-
+function subtract(number1, number2) {
+  return (number1 - number2);
+}
+console.log(subtract(2, 2))
 
 /**
  * Write a function called `min` that returns the smaller of two numbers
  */
-
+function min(number1, number2) {
+  return (Math.min(number1, number2));
+}
+console.log(min(2, 2))
 
 /**
  * Write a function called `max` that returns the larger of two numbers
  */
-
+function max(number1, number2) {
+  return (Math.max(number1, number2));
+}
+console.log(max(2, 2))
 /**
  * Write a function called `isEven` that takes a single value and
  * returns `true` if it is even and `false` if it is odd
  */
-
+function isEven(number) {
+  if (number % 2 == 0) {
+    return (true);
+  } else {
+    return (false);
+  }
+}
+console.log(isEven(1));
 
 /**
  * Write a function called `isOdd` that takes a single value and
  * returns `false` if it is even and `true` if it is odd
  */
+function isOdd(number) {
+  if (number % 2 == 0) {
+    return (false);
+  } else {
+    return (true);
+  }
+}
+console.log(isOdd(1));
 
 
 /**
  * Write a function called `factorial` that takes a single integer and
  * returns the product of the integer and all the integers below it
  */
-
-
+function factorial(number) {
+  let result = 1;
+  for (let factors = 1; factors <= number; factors++) {
+    result = (result * factors);
+  }
+  return (result);
+}
+console.log(factorial(4));
 /**
  * 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.
  */
+function oddFactorial(number) {
+  let result = 1;
+    for (let factors = 1; factors <= number; factors = factors + 2) {
 
+      result = (result * factors);
+    }
+  return result;
+};
+console.log(oddFactorial(4));
 
 /**
  * Write a function that solves the Chessboard exercise from chapter two,
@@ -68,7 +108,24 @@ 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
  */
-
+ function chessboard(number){
+ let size = number;
+
+ let board = "";
+
+ for (let y = 0; y < size; y++) {
+   for (let x = 0; x < size; x++) {
+     if ((x + y) % 2 == 0) {
+       board += " ";
+     } else {
+      board += "#";
+     }
+   }
+   board += "\n";
+ }
+ return board;
+}
+ console.log(8);
 
 /*******************************************
  * DO NOT CHANGE ANYTHING BELOW THIS LINE!
@@ -85,4 +142,3 @@ module.exports = {
   oddFactorial: typeof oddFactorial === 'function' ? oddFactorial : null,
   chessboard: typeof chessboard === 'function' ? chessboard : null,
 };
-