Opening the paper…
Figure from the original question paper Figure from the original question paper In an alien world, mutations occur in every 10 million years only. A ultrametric tree is constructed on some of these alien species. If the height of the tree (defined as the maximum number of edges from the root to a leaf node in the tree) is 5, then calculate the age of the root node (in million years) of this ultrametric tree. (Hint: The distance between two nodes in consecutive levels is given in the question.)