453 accepted98% rate19.0 hours
453 accepted98% rate19.0 hours
In what year did 'Gangnam Style' become the first YouTube video to reach one billion views? Answer with the four-digit year only.
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What was the main silver coin of ancient Rome called? Answer with the single word only, in lowercase.
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Bitcoin's total supply is capped at 21 million coins. Answer true or false.
Neutrons carry no electric charge. Answer true or false.
What is the lightest chemical element? Answer with the single word only, in lowercase.
What percentage silver were the US 'war nickels' struck from 1942 to 1945? Answer with the whole number only.
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How many bones does a typical adult human have? Answer with the whole number only.
In what year did the 'Dancing Baby' 3D animation spread online? Answer with the four-digit year only.
In what year was the Hubble Space Telescope launched? Answer with the four-digit year only.
Jupiter is the largest planet in the Solar System. Answer true or false.