Thanks Um and Mike for your responses and link, it is very useful to be pointed in the right direction as there is so much information on the forum it is sometimes difficult to know where to look without feeling lost and confused!
One thing that I am not very clear about is that AGS said the exams aim to test literacy, numeracy and problem solving skills. Now looking at the entrance test sample on their website it says 2 tests of 45 mins on numerical reasoning, verbal reasoning and non verbal skills. I started preparing my son using the Bond's How to do... NVR and Maths but I am not sure wether I should do Verbal Reasoning or English or both?
Would it be correct to assume that as AGS and KE's tests contents would be similar because they are both made by CEM Durham? Or could there be variations?
Thanks again for your time.