diff --git a/extra/1-factorial.js b/extra/1-factorial.js
index da9f8e6c..2642ff3b 100644
--- a/extra/1-factorial.js
+++ b/extra/1-factorial.js
@@ -6,11 +6,23 @@
         5! is 120 (because 5 * 4 * 3 * 2 * 1 = 120)
     
     Using a loop, complete the function below so it returns the factorial of the number being passed in. 
-*/
+*/// 
+//   
+// 
+
 
 function factorial(input) {
-  // TODO
+  let value=1;
+  while (input >=1) {
+    value=value*input;
+    input=input-1;
+  }
+  return value;
 }
+ 
+
+
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
diff --git a/mandatory/1-fix-functions.js b/mandatory/1-fix-functions.js
index 6323604f..07b27579 100644
--- a/mandatory/1-fix-functions.js
+++ b/mandatory/1-fix-functions.js
@@ -10,9 +10,7 @@
 
 */
 
-function getMood() {
-  let isHappy = true;
-
+function getMood(isHappy) {
   if (isHappy) {
     return "I am happy";
   } else {
@@ -21,7 +19,7 @@ function getMood() {
 }
 
 function greaterThan10(num) {
-  let isBigEnough;
+  let isBigEnough = num > 10;
 
   if (isBigEnough) {
     return "num is greater than 10";
diff --git a/mandatory/2-function-creation.js b/mandatory/2-function-creation.js
index d4590920..0bbe032c 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 +21,39 @@ function isAcceptableUser(userAge, isLoggedIn) {}
     is applieds and 142.5 should be returned)
 */
 
-function applyDiscount(totalPrice) {}
+function applyDiscount(totalPrice) {
+  let priceBelow200 = (95 / 100) * totalPrice;
+  let priceAbove200 = (90 / 100) * totalPrice;
+  if (totalPrice < 200) {
+    return priceBelow200;
+  } else {
+    return priceAbove200;
+  }
+}
 
 /*
   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 = 1;
+  while (i < limit) {
+    if (i % 2 === 1) {
+      console.log(i);
+    }
+    i++;
+  }
+}
 /*
   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;
+  }
+}
 
 /*
   Complete the function to determine if it is suitable for a person to register based on their age!
@@ -34,7 +61,15 @@ 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 if (age >= 90) {
+    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 +80,12 @@ function canRegister(age) {}
   )
 */
 
-function countReverse(number) {}
+function countReverse(number) {
+  while (number > 0) {
+    console.log(number);
+    number--;
+  }
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
@@ -90,11 +130,11 @@ describe("printOddNumbers", () => {
     const consoleLogSpy = jest.spyOn(console, "log");
 
     printOddNumbers(10);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(1,1);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(2,3);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(3,5);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(4,7);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(5,9);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(1, 1);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(2, 3);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(3, 5);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(4, 7);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(5, 9);
 
     consoleLogSpy.mockRestore();
   });
@@ -141,13 +181,13 @@ describe("countReverse", () => {
     const consoleLogSpy = jest.spyOn(console, "log");
 
     countReverse(7);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(1,7);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(2,6);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(3,5);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(4,4);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(5,3);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(6,2);
-    expect(consoleLogSpy).toHaveBeenNthCalledWith(7,1);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(1, 7);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(2, 6);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(3, 5);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(4, 4);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(5, 3);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(6, 2);
+    expect(consoleLogSpy).toHaveBeenNthCalledWith(7, 1);
 
     consoleLogSpy.mockRestore();
   });