Can You Solve My Problems? Errata/clarifications

Question 24: Wizards on a Bus.

I erroneously stated that wizard A does not have more than one child aged 1. In fact, he may have more than one child aged 1.

The online reference is here.

Question 36: Sangaku Triangle.

You need to assume that the square is a square.

Question 80: Planting Ten Trees.

The coins must be replaced on the paper.