Kevin,
　　I have passed the 640-605 testing in the morning today, my score is 875. There are 53 questions in total, the passing score is 706, the testing time is 105 mins. The testing question, i think, is relatively easy, if you prepare it well. There is a simulation lab about FR and drag and pull question about MODEM autoconfigure. You should familiar with CISCO 766,1601,1602,1603,1604, and so on