Fill a bathtub next to a sink.
Offer the applicant a siphon, a bucket, a paper cup, or a tablespoon, and ask them to empty the tub.
If they cannot decide quickly then you don't want to hire them for a job where they need to make decisions.
If they pick the siphon then they might be good for a government job where making things more complicated than they need to be is Ok.
If they pick the bucket then they might be good for a job where physical strength is desirable, but precision isn't.
If they pick the paper cup then they might be good for a job where thinking ahead isn't important, because the paper won't last.
If they pick the tablespoon spoon then they might be good for a job where activity paid by the hour is important, but accomplishing anything is not.
The one you want to hire will just pull the plug.
