I'm not a tutor (or Patricia!) but I have also been thinking about time management for the VR tests. In the first situation you describe, I would say to carry on working through the questions until there is less a minute to go then guess the remaining questions. It takes literally seconds to fill out a few answer boxes. I have advised DS to guess the same letter for all his guesses rather than opting for a different option each time in the hope that he would pick up one or two marks rather than none (if that makes sense).
In the second scenario (hope it wouldn't happen but you never know
), I would advise DS to look for the questions he knows he can do quickly first, then come back to the more time consuming types.
I am trying to decide whether to advise this approach from the start ie. start with the quicker types then come back to the more time consuming questions at the end. The concern, of course, is that he forgets to go back. We have just over two weeks to hone our time management. I am leaning towards just doing the questions in the order they come up.
Hope this helps. Any other thoughts?