like normally the final stages of his games are like 'ZOOM... third eye enhanced... (3,4) disallows (6,12) meaning (1,4:5:4) is a go... green light... we've recieved confirmation... oh fuck systems failing quick!!!! row is a 1/7 shot, column is a 1/14.... and we're safe... great job team"
it's not even that math isn't necessarily a good mechanical hook (look at the dozens of physics games that are smash hits) but arithmetic is just the bottom of the barrel. if it's easy arithmetic, there's no challenge cause humans are so good at it. if it's hard arithmetic, humans tune out because it's not worth the effort
this is like "guhhh uhh 3+4+5=12... wow..."