CIA challenges wannabe spooks to tell what time it is in this photo… can YOU do it?
THE CIA has set wannabe spooks another visual puzzle - this time with a wintry theme.
The spy agency challenged Twitter users to "put your analytical skills to the test" by working out the time of day in a ski resort street scene.
In September the CIA challenged Twitter to spot ten differences in a city scene - but many beat them by finding 11 or more.
The CIA tweeted: "If you found more than 10 differences, you practiced good tradecraft. Always look for opportunities to learn more."
The same happened the following month when users claimed they found 16 differences, five more than the target.
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Britain's GCHQ has also used puzzles in its recruitment campaigns, although they are much tougher.
They are so popular the code-cracking agency has published a book of logic challenges.