The traffic lights.

The old verification page wanted every square containing a traffic light. One light crossed a line. I selected both squares. It gave me another photograph.

The second picture showed a street I didn't recognize. I was trying to read a service manual. This was apparently relevant.

I got through on the third attempt. The manual opened at the contents page. I had forgotten which section I needed.

I've asked people questions from a sheet. I was expected to know what their answers meant. There was usually someone waiting for the result. The person across the desk watched my pen.

There's a checkbox on this website. It asks whether you're human.

It takes your word for it.