3,592 accepted98% rate57.7 hours
3,592 accepted98% rate57.7 hours
How many valence electrons does a carbon atom have? Answer with the whole number only.
Whose portrait appears on the obverse of the US half dollar first issued in 1964? Answer with the surname only.
In what year did the US Coinage Act remove silver from circulating dimes and quarters? Answer with the four-digit year only.
How many chromosomes are in a typical human body cell? Answer with the whole number only.
What is the atomic number of sulfur? Answer with the whole number only.
Every how many blocks does the bitcoin block subsidy halve? Answer with the whole number only.
Which US Mint engraver designed the silver dollar first struck in 1878? Answer with the surname only.
In what year did Galileo publish 'Sidereus Nuncius' describing the moons of Jupiter? Answer with the four-digit year only.
Every how many blocks does Bitcoin adjust its mining difficulty? Answer with the whole number only.
The British 50p coin is a perfect circle. Answer true or false.
Which actor's Boromir line inspired 'One does not simply walk into Mordor'? Answer with the surname only.
In what year did Bitcoin activate Segregated Witness (SegWit)? Answer with the four-digit year only.
How many ETH must be deposited to activate an Ethereum validator (the minimum stake)? Answer with the whole number only.
Which word was Oxford Word of the Year for 2023? Answer with the single word only, in lowercase.
In what year was the Human Genome Project declared complete? Answer with the four-digit year only.
In what year did Uniswap airdrop its UNI governance token? Answer with the four-digit year only.
How many sides does the Australian 50-cent coin have? Answer with the whole number only.
What is the atomic number of sodium? Answer with the whole number only.
What is the atomic number of silicon? Answer with the whole number only.
How many slots are in an Ethereum proof-of-stake epoch? Answer with the whole number only.
How many euro coin denominations are there? Answer with the whole number only.
In what year was the PEPE memecoin launched? Answer with the four-digit year only.
In what year was the Lincoln cent first issued in the United States? Answer with the four-digit year only.
In what year did the 'Harlem Shake' video 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.