Mr. Numbers

I am completely freaked out by Jack's mathematical ability! I was just putting him to bed and he asked me how many minutes there are in 12 hours... My first thought was, "I need a calculator!" but then we started to work it out:

Me: If there are 60 minutes in 1 hour, how many minutes are there in 2 hours?
Jack: 120
Me: Do you know how many minutes there are in 3 hours?
Jack: yes, 180
Me: What about 4 hours?
Jack: I don't know.
Me: Well, there are 60 minutes in 1 hour and there are 180 minutes in 3 hours so you would add 60 to 180.
Jack: Oh, 240.
Me: How many minutes are in 5 hours?
Jack: 300
Me: What about 6 hours?
Jack: I'm not sure.
Me: What is 300 plus 60?
Jack: 360, so that's how many minutes are in 6 hours?
Me: Yes. So to figure out 7 hours add 60 to that.
Jack: 420
Me: Add another 60 for 8 hours.
Jack: 480

The conversation went on like this until I stopped him at 14 hours! The cutest part about it is the way he pronounces the word "minutes"... He calls them "mimmits".