diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index d31a45c..ffcca9a 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -44,6 +44,11 @@ public ArrayList<Integer> getFavouriteNumbers() {
            second number contained in the list that is returned from getFavouriteNumbers
      */
 
+    public int getSecondNumber() {
+        ArrayList<Integer> list = getFavouriteNumbers();
+        return list.get(1);
+    }
+
 
 
     /*
@@ -56,6 +61,11 @@ public ArrayList<Integer> getFavouriteNumbers() {
          https://www.programiz.com/java-programming/library/arraylist/replaceall
      */
 
+    public ArrayList<Integer> multiply(ArrayList<Integer> list, int num) {
+        list.replaceAll(integer -> integer * num);
+        return list;
+    }
+
 
 
     /*
@@ -64,6 +74,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          The method must return a boolean that indicates whether the provided list is empty or not
      */
 
+    public boolean isEmpty(ArrayList<String> list) {
+        return list.isEmpty();
+    }
+
 
 
     /*
@@ -73,6 +87,11 @@ public ArrayList<Integer> getFavouriteNumbers() {
          The method must add the second parameter into the list provided and then return the list
      */
 
+    public ArrayList addIngredient(ArrayList<String> list, String ingredient) {
+        list.add(ingredient);
+        return list;
+    }
+
 
 
     /*
@@ -81,6 +100,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          - A string
          The method must remove the second parameter from the list and then return the list
      */
+    public ArrayList removeIngredient(ArrayList<String> list, String ingredient) {
+        list.remove(ingredient);
+        return list;
+    }
 
 
 
@@ -90,6 +113,9 @@ public ArrayList<Integer> getFavouriteNumbers() {
          - A string
          The method must return a boolean that indicates whether the second parameter exists in the provided list
      */
+    public boolean containsIngredient(ArrayList<String> list, String ingredient) {
+        return list.contains(ingredient);
+    }