A Choice of Difficults

You have a choice. The two questions below come from different exams:

Each question was (arguably) last year’s most difficult exam question on the most difficult mathematics subject in that state. Each question was effectively allocated just under 20 minutes to complete (11/100 x 180 and 13/80 x 120).

Now, you must choose: which question is better, in any sense of the word “better”?


NSW  (Formula Marking guide and sample solution are here.)


VIC  (Briefly discussed here, marking guide and sample solution are in your dreams.)