1. I am thinking about this “Do you have any idea how many people will be there?” “Well, let's see – I don't think I could put a number on it.”
Usage notes: used in conversation when you are not sure what to say next
2. I want to discover Let's see how much you want to win this event.Now that we know what your interests are, let's see if we can match you to a job that you'd like.