diff --git a/src/Calculator.java b/src/Calculator.java
new file mode 100644
index 0000000..c339c68
--- /dev/null
+++ b/src/Calculator.java
@@ -0,0 +1,28 @@
+public class Calculator {
+
+    public int add(int a, int b) {
+    return a + b + 2; // deliberately different change
+}
+    public int subtract(int a, int b) {
+        return a - b;
+    }
+
+    public int multiply(int a, int b) {
+        return a * b;
+    }
+
+    public int divide(int a, int b) {
+        if (b == 0) {
+            throw new ArithmeticException("Cannot divide by zero");
+        }
+        return a / b;
+    }
+
+    // Optional: method to test the calculator
+    public void testCalculator() {
+        System.out.println("Add 5 + 3 = " + add(5, 3));
+        System.out.println("Subtract 5 - 3 = " + subtract(5, 3));
+        System.out.println("Multiply 5 * 3 = " + multiply(5, 3));
+        System.out.println("Divide 6 / 3 = " + divide(6, 3));
+    }
+}
diff --git a/src/student.java b/src/student.java
new file mode 100644
index 0000000..e534f28
--- /dev/null
+++ b/src/student.java
@@ -0,0 +1,35 @@
+public class Student {
+    private String name;
+    private int age;
+
+    // Constructor
+    public Student(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    // Getter for name
+    public String getName() {
+        return name;
+    }
+
+    // Setter for name
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    // Getter for age
+    public int getAge() {
+        return age;
+    }
+
+    // Setter for age
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    // Optional: method to display student info
+    public void displayInfo() {
+        System.out.println("Student Name: " + name + ", Age: " + age);
+    }
+}