UK train driver selection uses timed aptitude tests of concentration, reaction, visual search, memory, rules, and judgement. These tests practise those task formats so assessment day is not the first time you sit this kind of work, under a clock.
A stream of letters. Was this one the same as two letters ago?
Why it is useful
You have to keep a short list in mind and update it while the next letter arrives. That is working memory under time pressure, which shows up in cab work.
Watch blocks flash in order, then click the same sequence. One miss ends the session.
Why it is useful
This is spatial memory, not digits. You keep a path in your head while the board is still in front of you. One miss ends the session, so guessing is expensive.