There is a “rule” in Average that we teach our Primary 5 and Primary 6 students. That is – whenever a question provides the average value, always compute the total. However, sometimes this “rule” cannot be applied. This happens when the number of related items is not provided.
For example, we can find the total mass of 5 tables, given their average mass is 5 kg. However, we will not be able to find the total mass of some tables, given their average mass is 5 kg.
In Matrix Math, we developed a method we coined as the Circles’ Method to solve such questions.
