diff --git a/number_utils.py b/number_utils.py
new file mode 100644
index 0000000..5dc5cf1
--- /dev/null
+++ b/number_utils.py
@@ -0,0 +1,2 @@
+def is_even(number):
+    return number % 2 == 0
diff --git a/tests/test_number_utils.py b/tests/test_number_utils.py
new file mode 100644
index 0000000..4e4b895
--- /dev/null
+++ b/tests/test_number_utils.py
@@ -0,0 +1,6 @@
+from number_utils import is_even
+
+
+def test_is_even():
+    assert is_even(4) is True
+    assert is_even(7) is False