Hi,
A few years back I did the test for Saen Options. Not a online one but the one at the office. It consited of 4 exercises.
1)the very easy question, like 45+219 or 1/5*9/2 or 5.5/2.2
at this test it is all about making no mistakes and be as speedy as you can.
2)finishing number series. Finish: 1,2,3,5,7,11,13,
3) test one but a little bit more complicated(no use of paper!);
(243*116-9)+(338/6.5+19)
4) I think this one was a part where they asked logical questions and other every day use questions, but I am not sure.
Anyway the thing is you have to do it quick! I have not done the test at Optiver so I can't say anything about that.
I have done the test at Curvalue(Amsterdam) as well. This one was a bit bigger, like two days of testing.They were back then in the same building as Saen. I passed both tests so it is do-able.
Funny thing: I think Saen is trading in Amsterdam now on the old Exchange floor. This is a very cool place to work in, at least better then in a gray building where they used to trade.
If you have anymore question(or about the job) please let me know.
gr