diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index d31a45c..36d8d16 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -3,6 +3,7 @@
 import com.booleanuk.helpers.ExerciseBase;
 
 import java.util.ArrayList;
+import java.util.List;
 
 public class Exercise extends ExerciseBase {
     /*
@@ -44,7 +45,9 @@ public ArrayList<Integer> getFavouriteNumbers() {
            second number contained in the list that is returned from getFavouriteNumbers
      */
 
-
+    public int getSecondNumber() {
+        return getFavouriteNumbers().get(1);
+    }
 
     /*
         TODO: 2. Create a method named multiply that accepts two parameters in this order:
@@ -56,7 +59,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          https://www.programiz.com/java-programming/library/arraylist/replaceall
      */
 
-
+    public ArrayList<Integer> multiply(ArrayList<Integer> numbers, int multiplier) {
+        numbers.replaceAll( x -> x*multiplier);
+        return numbers;
+    }
 
     /*
         TODO: 3. Create a method named isEmpty that accepts one parameter:
@@ -64,7 +70,7 @@ 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(); }
 
     /*
         TODO: 4. Create a method named addIngredient that accepts two parameters in this order:
@@ -73,7 +79,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          The method must add the second parameter into the list provided and then return the list
      */
 
-
+    public ArrayList<String> addIngredient(ArrayList<String> list, String ingredient) {
+        list.add(ingredient);
+        return list;
+    }
 
     /*
         TODO: 5. Create a method named removeIngredient that accepts two parameters in this order:
@@ -82,7 +91,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          The method must remove the second parameter from the list and then return the list
      */
 
-
+    public ArrayList<String> removeIngredient(ArrayList<String> list, String ingredient) {
+        list.remove(ingredient);
+        return list;
+    }
 
     /*
         TODO: 6. Create a method named containsIngredient that accepts two parameters in this order:
@@ -91,6 +103,6 @@ public ArrayList<Integer> getFavouriteNumbers() {
          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); }
 
 }