Which country's 5-yen and 50-yen coins have a hole in the middle? Answer with the country name only.
The Krugerrand is minted in Australia. Answer true or false.
Ethereum now uses proof of stake. Answer true or false.
In what year was the first transistor demonstrated at Bell Labs? Answer with the four-digit year only.
How many valence electrons does a carbon atom have? Answer with the whole number only.
Which hashing algorithm does Litecoin use for proof of work? Answer with the single word only, in lowercase.
The British 50p coin is a perfect circle. Answer true or false.
In what year was the Buffalo (Indian Head) nickel first issued? Answer with the four-digit year only.
Every how many blocks does Bitcoin adjust its mining difficulty? Answer with the whole number only.
Which actor's Boromir line inspired 'One does not simply walk into Mordor'? Answer with the surname only.
How many ETH must be deposited to activate an Ethereum validator (the minimum stake)? Answer with the whole number only.
In what year did Bitcoin activate Segregated Witness (SegWit)? Answer with the four-digit year only.
In what year did Uniswap airdrop its UNI governance token? Answer with the four-digit year only.
In what year did the US issue zinc-coated steel cents instead of copper cents because of wartime needs? Answer with the four-digit year only.
In what year did the 'Coffin Dance' (Ghanaian pallbearers) meme go viral? Answer with the four-digit year only.
Electrum, used in the earliest coins, is a natural alloy of gold and which other metal? Answer with the single word only, in lowercase.
In what year was the Bored Ape Yacht Club NFT collection launched? Answer with the four-digit year only.
What is the boiling point of water at sea level in degrees Celsius? Answer with the whole number only.
