diff --git a/extra/1-factorial.js b/extra/1-factorial.js
index da9f8e6c..2b51bd54 100644
--- a/extra/1-factorial.js
+++ b/extra/1-factorial.js
@@ -10,6 +10,13 @@
 
 function factorial(input) {
   // TODO
+  if (input < 0) 
+  return -1;
+else if (input == 0) 
+return 1;
+else {
+return (input * factorial(input - 1));
+}
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/mandatory/1-fix-functions.js b/mandatory/1-fix-functions.js
index 6323604f..4721f414 100644
--- a/mandatory/1-fix-functions.js
+++ b/mandatory/1-fix-functions.js
@@ -10,8 +10,8 @@
 
 */
 
-function getMood() {
-  let isHappy = true;
+function getMood(isHappy) {
+
 
   if (isHappy) {
     return "I am happy";
@@ -23,13 +23,13 @@ function getMood() {
 function greaterThan10(num) {
   let isBigEnough;
 
-  if (isBigEnough) {
+  if (num > 10) {
     return "num is greater than 10";
   } else {
     return "num is not big enough";
   }
 }
-
+// npm test -- --testPathPattern 1-fix-function
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 describe("getMood", () => {
diff --git a/mandatory/2-function-creation.js b/mandatory/2-function-creation.js
index d4590920..5951e322 100644
--- a/mandatory/2-function-creation.js
+++ b/mandatory/2-function-creation.js
@@ -4,7 +4,15 @@
     1. the user should be 18 or older
     2. the user must be logged in
 */
-function isAcceptableUser(userAge, isLoggedIn) {}
+// npm test -- --testPathPattern 2-function-creation
+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 +23,40 @@ function isAcceptableUser(userAge, isLoggedIn) {}
     is applieds and 142.5 should be returned)
 */
 
-function applyDiscount(totalPrice) {}
+function applyDiscount(totalPrice,discount) {
+  if (totalPrice >200) {
+    total= totalPrice-(totalPrice*0.1);
+    return total;
+  } else if (totalPrice < 200){
+    total=totalPrice-(totalPrice*0.05);
+    return total;
+  }
+}
 
 /*
   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 count = 1;
+while(count<=limit){
+if(count %2 == 1){
+  console.log(count);
+}
+count++
+}
+}
 
 /*
   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 {
+    return price2;
+  }
+}
 
 /*
   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 +83,13 @@ function canRegister(age) {}
   )
 */
 
-function countReverse(number) {}
+function countReverse(number) {
+  while( number >= 1){
+
+    console.log(number);
+    number--;
+    }
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */