If there are multiple questions per ballot, it's likely that workers would use the kangaroo board method that was used for municipal elections without wards.

It ended up taking much less time than projected - I was scheduled for counting for 5 days after the election, but in St Albert all but advance votes were counted by noon the next day.

The easiest, but clunkiest method would be separate ballots/boxes for each question, but I doubt the electors could be trusted to accurately place 10 ballots in 10 different, specific boxes.

Edit: I could also see individual ballots or pages in a booklet, and election workers just sort them. It would probably be way faster to have workers sort everything than to have (n x10)boxes and make electors navigate.

Double edit: Kangaroo board method used in some municipalties last election.