For the schools in the CSSE (Consortium of Selective Schools in Essex), the one exam provides a single standardised score for each individual candidate, which is then used by the CSSE member school(s) applied to as part of its ranking of those who name the school on their CAF. So taking DS2's score of 378.962 (which was actually from the slightly different version of the exam for 2014 entry, but it's the same principle) and the fact that we are in the priority area for two of the boys' grammar schools and for two of the three partially Selective member schools, he was eligible to apply to all of those as he met the threshold of 303 and in all except a couple of years historically, meeting the threshold, if IC, was enough, due to the relatively small size of the IC year 6 population vs 'the rest'.
For the next nearest boys' grammar, 20 miles away in Chelmsford, we are OOC, but that score would have got him a place there, had we been cruel enough to make him do the journey.
20+ miles further away again, the other CSSE boys' grammar, Colchester Royal Grammar School, at the time admitted solely on score, but DS2 would have been sure of a place. (There are people who make their DC do a 90-mile daily round trip for school, but we are not of their number. He followed his sibling two miles up the road to SHSB).
Underlying that individual standardised score is that candidate's raw score out of 60 in each of the two papers that make up the exam. The mean score for each, the standard deviation and the age adjustment (applied linearly by 'days younger than 1st September birthday will vary from cohort to cohort, obviously, gut the posts on the forum will at least give a view of what raw scores, for DC of what age, produced a particular standardised score in that year of entry.