diff --git a/lib/__pycache__/num_functions.cpython-310.pyc b/lib/__pycache__/num_functions.cpython-310.pyc
new file mode 100644
index 0000000..07e2086
Binary files /dev/null and b/lib/__pycache__/num_functions.cpython-310.pyc differ
diff --git a/lib/num_functions.py b/lib/num_functions.py
new file mode 100644
index 0000000..3cc0f90
--- /dev/null
+++ b/lib/num_functions.py
@@ -0,0 +1,2 @@
+def isDivBy(num, denom):
+    return num % denom == 0
diff --git a/problem1.py b/problem1.py
deleted file mode 100755
index b929f79..0000000
--- a/problem1.py
+++ /dev/null
@@ -1,6 +0,0 @@
-sum = 0
-
-for i in range(1, 1000):
-    if i % 3 == 0 or i % 5 == 0: sum += i
-
-print(sum)
diff --git a/src/problem1.py b/src/problem1.py
new file mode 100755
index 0000000..feeea44
--- /dev/null
+++ b/src/problem1.py
@@ -0,0 +1,10 @@
+import sys
+sys.path.append("lib")
+from num_functions import isDivBy
+
+sum = 0
+
+for i in range(1, 1000):
+    if isDivBy(i, 3) or isDivBy(i, 5): sum += i
+
+print(sum)