diff --git a/lib/extreme_startup/question_factory.rb b/lib/extreme_startup/question_factory.rb
index ac260b8..fa4c3be 100644
--- a/lib/extreme_startup/question_factory.rb
+++ b/lib/extreme_startup/question_factory.rb
@@ -277,7 +277,7 @@ def points
     def correct_answer
       n = @n1 + 4
       a, b = 0, 1
-      (0...n).each { |_| a, b = b, a + b }
+      n.times { a, b = b, a + b }
       a
     end
   end