diff --git a/extra/1-factorial.js b/extra/1-factorial.js
index da9f8e6c..0ad038ea 100644
--- a/extra/1-factorial.js
+++ b/extra/1-factorial.js
@@ -8,10 +8,25 @@
     Using a loop, complete the function below so it returns the factorial of the number being passed in. 
 */
 
+/*
+Pseudocode: 
+- We take a number and pass it as an argument into the function
+- Inside the fuction the number is then multiplied to one less than the number until it reaches 1. 
+
+*/
+
 function factorial(input) {
-  // TODO
+  let multiple = 1;
+  for (let i = input; i > 0; i--) {
+    multiple = multiple * input; 
+    input = input - 1;
+  }
+  return multiple;
 }
 
+
+
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 describe("factorial", () => {
diff --git a/mandatory/1-fix-functions.js b/mandatory/1-fix-functions.js
index 6323604f..db45cd7b 100644
--- a/mandatory/1-fix-functions.js
+++ b/mandatory/1-fix-functions.js
@@ -10,19 +10,16 @@
 
 */
 
-function getMood() {
-  let isHappy = true;
-
+function getMood(isHappy) {
   if (isHappy) {
     return "I am happy";
-  } else {
+  } else  {
     return "I am not happy";
   }
 }
 
 function greaterThan10(num) {
-  let isBigEnough;
-
+  let isBigEnough = num > 10;
   if (isBigEnough) {
     return "num is greater than 10";
   } else {
diff --git a/mandatory/2-function-creation.js b/mandatory/2-function-creation.js
index d4590920..94b1fee0 100644
--- a/mandatory/2-function-creation.js
+++ b/mandatory/2-function-creation.js
@@ -4,7 +4,13 @@
     1. the user should be 18 or older
     2. the user must be logged in
 */
-function isAcceptableUser(userAge, isLoggedIn) {}
+function isAcceptableUser(userAge, isLoggedIn) {
+  if (userAge >= 18  && isLoggedIn) {
+    return true;
+  } else {
+    return false;
+  }
+}
 
 /*
   Complete the function to apply discount percent based on how much is totalPrice in user cart.
@@ -15,18 +21,42 @@ function isAcceptableUser(userAge, isLoggedIn) {}
     is applieds and 142.5 should be returned)
 */
 
-function applyDiscount(totalPrice) {}
+function applyDiscount(totalPrice) {
+  if (totalPrice > 200) {
+    return 0.9 * totalPrice;
+  } else if (totalPrice > 0 && totalPrice < 200) {
+    return 0.95 * totalPrice;
+  } else {
+    return 0
+  }
+}
 
 /*
   Complete the function to print to the console the odd numbers between 1 and limit (use a while loop):
   */
-function printOddNumbers(limit) {}
+
+
+  function printOddNumbers(limit) {
+    let i = 0;
+    while ( i <= limit) {
+      if (i % 2 === 1) {
+        console.log(i);
+      } 
+      i = i + 1;
+    }
+  }
 
 /*
   Complete the buyTwoGetTheCheapestFree function: if user buys two items, the cheapest item will be free!
   The function should return the price to be paid once the discount is applied.
 */
-function buyTwoGetTheCheapestFree(price1, price2) {}
+function buyTwoGetTheCheapestFree(price1, price2) {
+  if (price1 > price2) {
+    return price1;
+  } else if (price2 > price1) {
+    return price2;
+  } else price1;
+}
 
 /*
   Complete the function to determine if it is suitable for a person to register based on their age!
@@ -34,7 +64,15 @@ function buyTwoGetTheCheapestFree(price1, price2) {}
   - if the person is older than 12 and younger than 90 it should return "You Can Register"
   - if the person is 90 or older it should return "You Don't Need To Register"
 */
-function canRegister(age) {}
+function canRegister(age) {
+  if (age <= 12) {
+    return "You Are Too Young To Register";
+  } else if (age > 12 && age < 90) {
+    return "You Can Register";
+  } else {
+    return "You Don't Need To Register";
+  }
+}
 
 /*
   Complete the function so that it prints out to the console numbers in reverse order starting at
@@ -45,7 +83,12 @@ function canRegister(age) {}
   )
 */
 
-function countReverse(number) {}
+function countReverse(number) {
+  while (number > 0) {
+    console.log(number);
+    number = number - 1;
+  }
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */