diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index 7987028..33de2bd 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -51,12 +51,19 @@ public Exercise(int age) {
         Create a constructor that accepts both a String and an int as parameters, in that order, and assign the values
         provided to the name and age members
      */
+    public Exercise(String name, int age){
+        this.name = name;
+        this.age = age;
+    }
 
 
 
     /*
         2. Create a method named add that accepts two integers. The method should return the numbers added together.
      */
+    public int add(int numOne, int numTwo){
+        return numOne+numTwo;
+    }
 
 
 
@@ -64,7 +71,8 @@ public Exercise(int age) {
         3. Create another method named add that accepts two Strings. The method should return the strings concatenated
         together with a space in between.
      */
-
-
+    public String add(String strOne, String strTwo){
+        return strOne + " " + strTwo;
+    }
 
 }
diff --git a/src/main/java/com/booleanuk/extension/Extension.java b/src/main/java/com/booleanuk/extension/Extension.java
index 62b878f..c93cb2d 100644
--- a/src/main/java/com/booleanuk/extension/Extension.java
+++ b/src/main/java/com/booleanuk/extension/Extension.java
@@ -25,6 +25,42 @@ public class Extension extends ExtensionBase {
         E.g.
         multiply(["2", "7", "3"], 3) -> [6, 21, 9]
      */
+    public float add(float flOne, float flTwo){
+        return flOne + flTwo;
+    }
 
+    public double add(double dblOne, double dblTwo){
+        return dblOne + dblTwo;
+    }
 
+    public float subtract(float flOne, float flTwo){
+        return flOne - flTwo;
+    }
+
+    public String subtract(String str, char ch){
+        return str.replace(Character.toString(ch), "");
+    }
+
+    public int multiply(int numOne, int numTwo){
+        return numOne * numTwo;
+    }
+
+    public String multiply(String str, int num){
+        String sequence = str;
+        for (int i = 1; i<num; i++){
+            sequence = sequence + "," + str;
+        }
+        return sequence;
+    }
+
+    public int[] multiply(String[] strarr, int num){
+        int[] result = new int[strarr.length];
+        int temp;
+        for(int i = 0; i<strarr.length; i++){
+            temp = Integer.parseInt(strarr[i]);
+            temp=temp*num;
+            result[i]=temp;
+        }
+        return result;
+    }
 }
diff --git a/src/test/java/com/booleanuk/extension/ExtensionTest.java b/src/test/java/com/booleanuk/extension/ExtensionTest.java
index 29bb652..4927175 100644
--- a/src/test/java/com/booleanuk/extension/ExtensionTest.java
+++ b/src/test/java/com/booleanuk/extension/ExtensionTest.java
@@ -47,4 +47,4 @@ public void shouldMultiplyArray() {
 
         Assertions.assertArrayEquals(result, this.extension.multiply(nums, 3));
     }
-}
+}
\ No newline at end of file