Any questions, feel free to ask.

Don't you love that obliging offer?

A friend of mine used to respond to any university lecturers who offered this assistance, by raising his hand & asking "Who cut your hair?"

I prefer more of a challenge. And so I just replied to our helpdesk with:

What is the capital of Uzbekistan?

And fairplay, they came back to me within about 20 seconds with "Tashkent".

I need some questions in reserve that are not so easily googled...