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 ?
It's still a head-scratcher, long after the ship has sailed.
Alas, this NBC series by way of France doesn't make that turn, leaving behind a head-scratcher of a show, derived from a last-century French movie written by Luc Besson ("Taxi"), and casting "Grey's Anatomy" alum Chyler Leigh as the latest in a long line of unconvincing hardbitten smallscreen detectives.
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.
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.
FINNERAN/COUNTERPOINT: "I'm not challenging the validity of that [the point that the longer students are in school the worse they do] but it's a head-scratcher," Finneran responds.
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.
Mounting a musical in an 888-seat venue such as the Haymarket was always going to be a head-scratcher in terms of profitability.