diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index d31a45c..12eadd4 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -43,7 +43,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
         TODO: 1. Create a method named getSecondNumber that returns a whole number. It must return the
            second number contained in the list that is returned from getFavouriteNumbers
      */
-
+    public int getSecondNumber() {
+        ArrayList<Integer> list = getFavouriteNumbers();
+        return list.get(1);
+    }
 
 
     /*
@@ -56,6 +59,11 @@ public ArrayList<Integer> getFavouriteNumbers() {
          https://www.programiz.com/java-programming/library/arraylist/replaceall
      */
 
+    public ArrayList<Integer> multiply(ArrayList<Integer> numbers, int multiplier) {
+        numbers.replaceAll(e -> e * multiplier);
+        return numbers;
+    }
+
 
 
     /*
@@ -63,7 +71,9 @@ public ArrayList<Integer> getFavouriteNumbers() {
          - A list of strings
          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();
+    }
 
 
     /*
@@ -72,7 +82,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          - A string
          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;
+    }
 
 
     /*
@@ -81,7 +94,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          - A string
          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;
+    }
 
 
     /*
@@ -91,6 +107,8 @@ 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);
+    }
 
 }