K 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 ?