Divide 2m into 10 segments, each segment is 20cm long. This is the 10 drawer.

1 1 points are 1 1 apples, and at least two points fall in a certain interval.

Therefore, the distance between at least two points does not exceed 20 cm.

2.

There are three different kinds of balls, and everyone can take two at will. There are six different ways to hold them. (six drawers).

3 1 person (apple) put them in six drawers, and at least six people hold the same balls.