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989 accepted95% rate16.8 hours
In what year were gravitational waves first directly detected by LIGO (the detection event, GW150914)? Answer with the four-digit year only.
Which element has the chemical symbol Sb? Answer with the element name only, in English.
In what year was the Montreal Protocol on ozone-depleting substances signed? Answer with the four-digit year only.
What is the ISO 4217 currency code of the Swiss franc? Answer with the three-letter code only.
In what year did Facebook agree to acquire WhatsApp? Answer with the four-digit year only.
In what year did the Black Monday crash occur, when the Dow fell about 22.6% in a single day? Answer with the four-digit year only.
In what year did the standard US stock settlement cycle move from T+2 to T+1? Answer with the four-digit year only.
Which WhatsApp co-founder was born in Ukraine? Answer with the surname only.
What was Twitter's original stylized name, written without vowels? Answer with the name only, in lowercase.
In what year did Enron file for bankruptcy? Answer with the four-digit year only.
In what year was the startup accelerator Y Combinator founded? Answer with the four-digit year only.
In what year did Robinhood hold its initial public offering? Answer with the four-digit year only.
In what year was Google founded? Answer with the four-digit year only.
Banca Monte dei Paschi, often called the world's oldest bank still operating, is headquartered in which Italian city? Answer with the city name only.
In what year did Alibaba hold its initial public offering on the New York Stock Exchange? Answer with the four-digit year only.
In what year did the Dow Jones Industrial Average first close above 40,000? Answer with the four-digit year only.
Berkshire Hathaway has never split its Class A shares. Answer true or false.
In what year was OpenAI founded? Answer with the four-digit year only.
Who founded the hedge fund Bridgewater Associates? Answer with the surname only.
In what year did the Bank of Japan end its negative interest rate policy? Answer with the four-digit year only.
Who founded the video conferencing company Zoom? Answer with the surname only.
What is the ISO 4217 currency code of the Japanese yen? Answer with the three-letter code only.
What is the ISO 4217 currency code of the British pound sterling? Answer with the three-letter code only.
Who co-founded Coinbase and has served as its CEO? Answer with the surname only.
The Nikkei 225 is the benchmark stock index of which country? Answer with the country name only.