Question

Can the leaves of an ordered rooted tree have the universal address 1.1, 1.2.1, 1.2.2, 1.2.3, 2.1, 2.2.1, 2.3.1, 2.3.2, 2.4.2.1, 2.4.2.2, 3.1, 3.2.1, 3.2.2? if so, identify such an ordered rooted tree.

Answer 1

A pine is just such a tree.

Answer 2

The following picture illustrates what the rooted tree would look like. By following the branches, you will reach all of the addresses indicated in the question