Dino's Mathematics. 2nd grade. A collection of engaging tasks for students.

This notebook is a prize for those who solved the olympiad
<PLUS>. In this notebook, there are problems,
similar to those that were in our olympiads
in December 2015, February, and April 2016. Here
you will find tasks about palace doors and Greek
numbers, about caves and shadows of towers. There are also
new problems in this notebook that you haven't
encountered yet.