diff --git a/index.js b/index.js
index 0b32465..53ec75a 100644
--- a/index.js
+++ b/index.js
@@ -6,4 +6,11 @@ function subtract(a, b) {
   return a - b;
 }
 
-module.exports = { add, subtract };
+function divide(a, b) {
+  if (b === 0) {
+    throw new Error("Division by zero");
+  }
+  return a / b;
+}
+
+module.exports = { add, subtract, divide };
diff --git a/test.js b/test.js
index cef9a03..baa2ff8 100644
--- a/test.js
+++ b/test.js
@@ -1,8 +1,10 @@
-const { add, subtract } = require("./index");
+const { add, subtract, divide } = require("./index");
 
 const assert = require("assert");
 
 assert.strictEqual(add(1, 2), 3);
 assert.strictEqual(subtract(5, 3), 2);
+assert.strictEqual(divide(10, 2), 5);
+assert.throws(() => divide(1, 0), /Division by zero/);
 
 console.log("All tests passed!");