They gave me a cognitive test at my last annual check-up, and I was only 68 at the time. It was pretty simple, give you a set of words to remember while talking about other things, set the hands on a clock for a particular time, simple math questions (8*4 and what is 20% of 100) and some other simple little things.................
The only one I have difficulty with was the one where you subtract 7 beginning with the number 100. But to be honest I have trouble with those type of problems if I was 25.