Apologies for piggybacking on this thread with a slightly different query, it was the response to the OP that has given me confidence for our daughters chances, much appreciated.
My query is, what is the relevance of the "cut off" score.
How would it relate to us, resident in Gravesend, considering Rochester, Mayfield and Dartford.
RGS offer places purely based on scores. They have 175 places available. The "cut off" score is the lowest score that is needed to obtain one of those 175 places. This changes every year depending on the girls that apply.
For 2012 entry the cut off was 515 (10 above the Medway Test pass mark), 2013 was 514 (5 above pass mark), 2014 was 529 (1 above) and 2015 was 535 (10 above pass mark) and RGS increased to 205 places available.
In 2016 it was back to 175 places but I can't find any data for the cut off or pass mark.
2017 will also be 175 places and the pass mark is 513.
Note that of the schools you listed, this only applies to RGS - Mayfield and Dartford both use catchment area to determine places, with scores being used in case of over-subscription.
For exact details of admission criteria for each school check out these links: