Recently my father’s combine auger fell off while he was unloading wheat. What had happened was the ball bearing were rusty, bound up and fell out of the auger. Without these ball bearings the entire auger fell off of the machine. It was impossible to count them because we couldn’t find them all anymore, and so the question became . . . How many ball bearings do I need to order from the parts store in order to have the correct amount. The parts store is a one day drive away, and so we had to have an accurate count before we drove to go get them or we would have lost an entire day, and still could not fix the machine. So here is your problem. All you have is a dollar bill to measure with. You could only find four ball bearings. How many bearing do you need to order to completely cover the outside of the ring so that we can fix the auger?