Mary Ann didn't know if her eyes were playing tricks on her or what. When she first looked at the people in the park from the hill she was sitting on, it looked as if they were all in groups of two. Those groups of two seemed to drift together to form groups of four, and then there were two people left over. The next time she looked they appeared to be in groups of three, but the same two were left over. As she double-checked, it seemed as though those groups of three completely transformed themselves into groups of five, and this time there were four left over. There were less than a hundred people at the park. How many were there