diff --git a/bin/main/com/booleanuk/core/Exercise.class b/bin/main/com/booleanuk/core/Exercise.class
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index 0000000..7de70ab
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diff --git a/bin/main/com/booleanuk/extension/Extension.class b/bin/main/com/booleanuk/extension/Extension.class
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index 0000000..a9089b1
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diff --git a/bin/main/com/booleanuk/helpers/ExerciseBase.class b/bin/main/com/booleanuk/helpers/ExerciseBase.class
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index 0000000..28ea91f
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diff --git a/bin/test/com/booleanuk/core/ExerciseTest$1.class b/bin/test/com/booleanuk/core/ExerciseTest$1.class
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index 0000000..3b291c4
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diff --git a/bin/test/com/booleanuk/core/ExerciseTest$2.class b/bin/test/com/booleanuk/core/ExerciseTest$2.class
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diff --git a/bin/test/com/booleanuk/core/ExerciseTest$3.class b/bin/test/com/booleanuk/core/ExerciseTest$3.class
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diff --git a/bin/test/com/booleanuk/core/ExerciseTest$4.class b/bin/test/com/booleanuk/core/ExerciseTest$4.class
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diff --git a/bin/test/com/booleanuk/core/ExerciseTest$5.class b/bin/test/com/booleanuk/core/ExerciseTest$5.class
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new file mode 100644
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diff --git a/bin/test/com/booleanuk/extension/ExtensionTest.class b/bin/test/com/booleanuk/extension/ExtensionTest.class
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diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index d31a45c..ea43257 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -43,6 +43,9 @@ 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() {
+        return getFavouriteNumbers().get(1);
+    }
 
 
 
@@ -55,6 +58,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          Use the ArrayList's replaceAll method to iterate through the ArrayList and replace each value with its double
          https://www.programiz.com/java-programming/library/arraylist/replaceall
      */
+    public ArrayList<Integer> multiply(ArrayList<Integer> nums, int n) {
+        nums.replaceAll(num -> num * n);
+        return nums;
+    }
 
 
 
@@ -63,6 +70,9 @@ 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> strings) {
+        return strings.isEmpty();
+    }
 
 
 
@@ -72,6 +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> strings, String s) {
+        strings.add(s);
+        return strings;
+    }
 
 
 
@@ -81,6 +95,10 @@ 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> strings, String s) {
+        strings.remove(s);
+        return strings;
+    }
 
 
 
@@ -91,6 +109,10 @@ 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> strings, String s) {
+        return strings.contains(s);
+    }
+     
 
 
 }