I took an online IQ test when I was young. I thought it would only go up from there. Instead, it seems to have either plateaued or gone down. I didn't understand why it was timed either, but now that I'm older I understand why the timing is so critical. If you get the answer too late, it is of no use. There is a quote I got from a fortune cookie, let's see if I can remember without googling it, much of wisdom is being wise in time.