diff --git a/004.py b/004.py
index d754d22..3ee4745 100644
--- a/004.py
+++ b/004.py
@@ -7,5 +7,5 @@ def palindrome():
                 palindromes[i * ii] = [i, ii]
     p = sorted(palindromes.keys(), reverse=True)[0]
     print 'Palindrome: {0}x{1}: {2}'.format(palindromes[p][0], palindromes[p][1], p)
-
-palindrome()
+if __name__ == '__main__':
+    palindrome()
diff --git a/005.py b/005.py
index f4674a4..4f7318d 100644
--- a/005.py
+++ b/005.py
@@ -8,5 +8,5 @@ def divisible(n):
                 break
         if ii == 1:
             return x
-
-print 'Smallest number: ', divisible(20)
+if __name__ == '__main__':
+    print 'Smallest number: ', divisible(20)
diff --git a/006.py b/006.py
index 91c8006..1470d52 100644
--- a/006.py
+++ b/006.py
@@ -1,9 +1,11 @@
 def squarediff(n):
+    print 'Checking for n =', n
     sumofsquares = sum([x**2 for x in range(n + 1)])
     print 'Sum of squares', sumofsquares
     squareofsum = sum(range(n + 1))**2
     print 'Square of sum', squareofsum
     print 'Difference', squareofsum - sumofsquares
 
-squarediff(10)
-squarediff(100)
+if __name__ == '__main__':
+    squarediff(10)
+    squarediff(100)
diff --git a/007.py b/007.py
index 3129d24..0af7cd4 100644
--- a/007.py
+++ b/007.py
@@ -12,5 +12,6 @@ def primes(limit):
         i = i + 2
     return primes
 
-print '6th Prime', primes(6)[-1]
-print '10001st Prime', primes(10001)[-1]
+if __name__ == '__main__':
+    print '6th Prime', primes(6)[-1]
+    print '10001st Prime', primes(10001)[-1]