By four

main.py

@@ -7,6 +7,13 @@ def divide_by_two(num): # Take last digit, divide by two only on that
 def divide_by_three(num): # Sum each digit in number, then checking that sum is divisible by three
     return _sum_digits(num) % 3 == 0
 
+def divide_by_four(num): # If last two digits are divisible by four
+    if (num < 10): return num % 4 == 0
+    tens_place = _get_last_digit(num, 2)
+    ones_place = _get_last_digit(num)
+    num_to_check = (tens_place * 10) + ones_place
+    return num_to_check % 4 == 0
+
 def divide_by_five(num): # If last digit is a zero or a five return true
     last_digit = _get_last_digit(num)
     return last_digit == 0 or last_digit == 5
@@ -18,8 +25,8 @@ def divide_by_six(num): # Same rules as dividing by three, and ensure original n
 def divide_by_nine(num): # Same rules as dividing by three, but checking that sum is divisible by nine
     return _sum_digits(num) % 9 == 0
 
-def _get_last_digit(num):
-    return int(f"{num}"[-1])
+def _get_last_digit(num, indexFromEnd = 1):
+    return int(f"{num}"[-1 * indexFromEnd])
 
 def _sum_digits(num):
     num_string = f"{num}"

tests/four_test.py

@@ -0,0 +1,18 @@
+from main import divide_by_four
+import unittest
+
+class TestDivideByTwo(unittest.TestCase):
+    def test_by_1(self):
+        self.assertFalse(divide_by_four(1))
+    def test_by_2(self):
+        self.assertFalse(divide_by_four(2))
+    def test_by_3(self):
+        self.assertFalse(divide_by_four(3))
+    def test_by_4(self):
+        self.assertTrue(divide_by_four(4))
+    def test_by_5(self):
+        self.assertFalse(divide_by_four(5))
+    def test_by_8(self):
+        self.assertTrue(divide_by_four(8))
+    def test_by_362880(self):
+        self.assertTrue(divide_by_four(362880))