a head-scratcher

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a head-scratcher

A thoroughly complex or difficult mystery, problem, puzzle, or riddle. I'm not sure how we'll be able to reach an agreement with the labor unions on this issue. It's a head-scratcher, to be sure. A: "What is weightless but can be seen, and if you put it in a bucket, it will make the bucket lighter?" B: "Hmm, I don't know. That's a real head-scratcher!
References in periodicals archive ?
A bit of a head-scratcher, it''ll certainly form the basis of many a debate long after the end credits roll.
It was a head-scratcher that haunts us to this day.
That might be a bit of a head-scratcher to some, and it's no knock on Bosh, but this isn't the same Butler that Lakers fans remember.
The combination seems like a head-scratcher at first: a cherished, classic ballet movie; a genial, old-school tap master; and a hit-machine soul band from the '70s.
Henlow is best given the widest of berths, and Nottingham's five opens have a definite feeling of card-padding, although the closing 10pm over 500m is a bit of a head-scratcher.
What Doesn't Work, page 64: Why Nokia's new N-Gage, a cell phone and videogame console in one, is turning into a head-scratcher.
Little Children'' is something of a head-scratcher.
THOUGH DEEPLY FELT and unwaveringly thoughtful, ``Bee Season'' is something of a head-scratcher.
This half-billion tax increase on telephone services to pay for emergency services is a head-scratcher, leaving you wondering why this tax should pay for this service?