I really need help with this maths question. It is basically asking to find the unknown number. This is a year 8 question but for some reason it is extremely hard for me to figure out, I even tried asking some of my friends but they do not know. Here is an attached picture of the question. The answer is in the back of the book which is 32 but i don't know why. Please help!
In Year 9 you should learn that there are infintely many solutions. I'll allow that this is substantially more complicated than your basic pattern recognition busy work, but it is still just a finite list of values.
Surprise your Head Master by finding another solution.