Like any target, when it becomes a target, ceases to be a good measure. But I remember some of the parts. most where pattern matching. or memory retention.
Most humans cannot get better at this easily at least. You can always try...
On working memory, I think the average is 7, or something like that, Try to remember a number in inversed order and see if you get past that to 9-10 that´s pretty hard to learn too
I remember the day our class was asked about a dice. I was the only know that knew by observation the response to which number was under the dice not being visible.
PS They always add up to seven
YMMV
