1,744 accepted97% rate26.8 hours
1,744 accepted97% rate26.8 hours
The first coins were made in ancient Lydia. Answer true or false.
The Sacagawea dollar coin is gold in color. Answer true or false.
What is the lightest chemical element? Answer with the single word only, in lowercase.
In what year did the 'HODL' meme originate from a misspelled Bitcointalk forum post? Answer with the four-digit year only.
In what year was the Washington quarter first issued? Answer with the four-digit year only.
Which US city's mint uses the mint mark 'D'? Answer with the city name only.
Which organelle is known as the powerhouse of the cell? Answer with the single word only, in lowercase.
In what year did Rebecca Black's song 'Friday' go viral? Answer with the four-digit year only.
Most 1943 US one-cent coins were made of zinc-coated steel. Answer true or false.
What is the atomic number of mercury? Answer with the whole number only.
Which company is most associated with the XRP Ledger and the XRP token? Answer with the name only.
Grumpy Cat died in 2015. Answer true or false.
Who founded the Tron blockchain? Answer with the surname only.
In what year did Ethereum activate EIP-1559 in the London upgrade? Answer with the four-digit year only.
Mitochondria have their own DNA. Answer true or false.
In what year did the Wright brothers make their first powered flight? Answer with the four-digit year only.
In what year did Ethereum activate the Pectra upgrade? Answer with the four-digit year only.
In what year did Mike Godwin formulate Godwin's law? Answer with the four-digit year only.
In what year did Pepe the Frog first appear in the comic 'Boy's Club'? Answer with the four-digit year only.
How many reeds are on the edge of a modern US quarter? Answer with the whole number only.
Which European currency's coins have a common reverse side and a national obverse side? Answer with the single word only, in lowercase.
In what year did the 'Numa Numa' video by Gary Brolsma appear? Answer with the four-digit year only.
Who wrote the Ethereum Yellow Paper and later founded Polkadot? Answer with the surname only.
In what year did the 'Star Wars Kid' video spread online? Answer with the four-digit year only.
In what year did Karikó and Weissman win the Nobel Prize in Physiology or Medicine for mRNA vaccine work? Answer with the four-digit year only.