Back when I was in sixth grade, we had a warm up everyday on the whiteboard when we came into class. For a few months in the middle of the year, our project was the "Four 4s," where we had to make every number from 1 to 100 with the combination of four 4s in any mathematical sequence. I had a dream last night which involved switching math games with a friend. I eventually suggested the "Four 4s." I got stumped at 13; I am a lot better at math when awake. I wrote a few down and added a couple of alternatives.