Hi and welcome,
Results are posted out on the Friday, though sometimes children at primary schools in the area seem to find out a bit in advance!
The letter usually just says "has reached the qualifying standard" or words to that effect or "has not reached the qualifying standard". You generally have to ring the school to find out the actual scores.
The qualifying mark is a standardised score of 220 over the two tests.
Reaching the qualifying score does not guarantee a place. You need to read the Admissions Policy as priority is given to children living in the designated area, then those attending certain primary schools and then on score order to those living outside the area.
http://www.lincolnshire.gov.uk/upload/p ... 290409.pdf
It would be unusual for a child who reached the qualifying score and lived in area not to get a place (but that is not to say it couldn't happen!), however last year the cut-off score for an out of area place was 225.
You will not know for definite until the March 1 offers are sent out, but finding out the score and talking to the school should give you a fairly good idea of your chances.