The solution to this kind of problem is called "drawer method", that is, there are several drawers, and several objects are placed in these drawers, which requires that there should be objects in each drawer. If there are too many items, obviously some drawers must hold more than 1 items. So how many drawers do you need to hold more than 1 objects? Obviously, the total number of objects is several more than the total number of drawers (if there are no two drawers), and there are several drawers for two objects. So we can see that there are 62-4=58 "drawers" (students), 65,438+065,438+0+56 "objects" (skills), making a total of 65,438+065,438+0+56 = 67, so there is: 67.