Søknader also stands for computer applications as well as job, admission applications?
(This might be in the notes. Can't read it on mobile.)
Søknad is for everything you apply to get (a job, a loan, for your kid to get into a kindergarten, to get into university/higher education and so on).
When I mouse over "Søknaden", I get "the (job) application". (This may have been added since your post a month or so ago, or maybe didn't show up on mobile.)
why is the number '2' not accepted in this case and only the written two? I've come across exercises where the digital number has been accepted