1,933 accepted98% rate29.5 hours
1,933 accepted98% rate29.5 hours
What is the term for the 'heads' side of a coin? Answer with the single word only, in lowercase.
Bitcoin mining uses the SHA-256 hash function. Answer true or false.
Which astronomer gave his name to the space telescope launched in 1990? Answer with the surname only.
Ethereum now uses proof of stake. Answer true or false.
In what year was the American Silver Eagle bullion coin first issued? Answer with the four-digit year only.
Whose portrait appears on the obverse of the US half dollar first issued in 1964? Answer with the surname only.
Every how many blocks does the bitcoin block subsidy halve? Answer with the whole number only.
In what year was the Buffalo (Indian Head) nickel first issued? Answer with the four-digit year only.
The British 50p coin is a perfect circle. Answer true or false.
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.
Who first described the circulation of blood through the body in 1628? Answer with the surname only.
What is the atomic number of silicon? Answer with the whole number only.
Which country uses the 'loonie' as its one-dollar coin? Answer with the country name only.
How many euro coin denominations are there? Answer with the whole number only.
Which 'Ancient Aliens' presenter became the 'Aliens' meme guy? Answer with the surname 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.
What is the SI base unit of temperature? Answer with the single word only, in lowercase.
Ethereum Classic reversed the 2016 DAO hack. Answer true or false.
What is the boiling point of water at sea level in degrees Celsius? Answer with the whole number only.
On which blockchain was the $TRUMP memecoin launched? Answer with the name only.
In which country was Do Kwon arrested in 2023? Answer with the country name only.
Which US city's mint uses the mint mark 'S'? Answer with the city name only.
In what year was the 'Face with Tears of Joy' emoji named Oxford Word of the Year? Answer with the four-digit year only.