Timekeeping quiz
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Whose calendar sparked the 2012 end-of-the-world rumours?
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More questions about Timekeeping
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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What time do watch ads usually show?
Answer: 10:10
Why: In a 2017 experiment, watches showing 10:10 made people feel happier and keener to buy than the same watches at 11:30.
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How many hours did the French Revolution's official day have?
Answer: 10
Why: Each decimal hour had 100 decimal minutes of 100 decimal seconds, so the day held 100,000 decimal seconds.
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Which clock part makes the tick-tock sound?
Answer: Escapement
Why: Each swing of the pendulum releases one tooth of the escape wheel, so the gears move on in tiny fixed steps.
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What winds a self-winding watch?
Answer: Arm movement
Why: Inside, an off-centre weighted rotor swings with every move of the wrist and winds the mainspring through a ratchet.
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In which month was the October Revolution, by today's calendar?
Answer: November
Why: Russia still followed the Julian calendar, then 13 days behind, and only switched to the Gregorian in February 1918.
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In which year will 32-bit Unix clocks run out?
Answer: 2038
Why: Unix time counts seconds from 1 January 1970, and a signed 32-bit number runs out after 2,147,483,647 of them.
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