I looked at some related questions about piano key numbers but I was wondering how many keys would be required specifically for piano exams.
I have previously trained to grade 4 in ABRSM but that was some years ago and I want to buy my first keyboard and start from scratch. But in general I want to make an investment to get a keyboard that will last me through the different grades and not "outgrow" my keyboard later on in life.
It seems the main debate is between 61, 76 and 88 keys. I found the syllabus for the ABRSM but I don't exactly know how this translates into numbers of keys. I can't remember how many keys the piano I used to play had.