I was trying to learn some math in my 50's. I hired a NYU math PHD to come to my office once a week for $100/hour (an NYU course was $6000/semester). I think it

I was trying to learn some math in my 50's. I hired a NYU math PHD to come to my office once a week for $100/hour (an NYU course was $6000/semester). I think it worked out well for both of us.