I'm not sure if this is in the right section, but here goes... I'm currently applying as a train conductor. Within a few weeks, I'll have to do a certain test of focus (among other tests). From a friend of mine, I've heard this test is as follows: in the course of about half an hour, it'll show some numbers that add up. So first it'll show a one. Then, after some random time, it'll show a two. Then a three. And so on. This is normal. Except that it doesn't ALWAYS shows the next number. When it shows a different number (I presume the same as the previous, or one above what is expected), it's the testee's task to press a button. Then, and only then. The goal is obviously to test whether the applicant can remain focused for longer periods of time (hence: thirty minutes of mostly boredom). Now...as such a job would make for a pretty straightforward programming job, this test (or a very similar one) can probably be found on many places on the internet. The problem is...I have no idea where. Since it has objectives, interaction and a goal, it can be technically viewed to be a game, but how would you find it? I also have no idea of the name of said test, so google isn't much help. Hence this thread: an open question whether someone of you know some sites that have this sort of test (the long length is the most crucial part). Or have some keywords on the sort of test I'm describing that'll help me with googling something like this. So...a little help? Thanks in advance.