This was a question I gave as a post grad TA to third year physics students. In three classes totaling 43 students exactly one got it right and he was a double

This was a question I gave as a post grad TA to third year physics students. In three classes totaling 43 students exactly one got it right and he was a double major from CS. This is Latex, it renders nicely to: https://arachnoid.com/latex/?equ=%24%20%5Cfrac%7B%5Cfrac%7Ba%7D%7Bb%7D%7D%7Bc%20%5Ctimes%20%5Cfrac%7Bd%7D%7B%5Cfrac%7Be%7D%7Bf%7D%7D%7D%20%5Ctimes%20%5Cfrac%7B%5Cfrac%7Bg%7D%7Bh%20%5Ctimes%20%5Cfrac%7Bi%7D%7Bj%7D%7D%7D%7Bk%7D%20%24 https://arachnoid.com/latex/?equ=%24%20%5Cfrac%7B%5Cfrac%7Ba... Which is the question I posted all those many years ago.