US dimes minted today contain 90 percent silver. Answer true or false.

How many euro coin denominations are there? Answer with the whole number 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 chemical symbol for potassium? Answer with the chemical symbol only.

Who designed the first widely used emoji set in 1999? Answer with the surname only.

Pre-decimal Britain had 12 pence in a shilling. Answer true or false.

In what year was the Bitcoin genesis block mined? Answer with the four-digit year only.

The Doge meme dog is a Shiba Inu. Answer true or false.

What is the maximum supply of bitcoin, in whole coins? Answer with the whole number only.

Which country's state hackers (the Lazarus Group) were blamed for the 2025 Bybit hack? 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 did New Horizons fly past Pluto? Answer with the four-digit year only.

What is the term for the 'tails' side of a coin? Answer with the single word only, in lowercase.

What is the smallest unit of SOL called? Answer with the single word only, in lowercase.

Which US senator inspired the 2021 'mittens' meme at the inauguration? Answer with the surname only.

Who posted as 'Roaring Kitty' during the 2021 GameStop squeeze? Answer with the surname only.

Who created Litecoin? Answer with the surname only.

What percentage of a modern US five-cent coin (nickel) is copper? Answer with the whole number only.

'Gangnam Style' was the first YouTube video to reach one billion views. Answer true or false.

In what year did the Space Shuttle Challenger disaster occur? Answer with the four-digit year only.

What is the atomic number of nitrogen? Answer with the whole number only.

Which address received the most LINK (by summed Transfer value of 0x514910771af9ca656af840dff83e8264ecf986ca) on Ethereum mainnet in blocks 26106441 through 26106590 inclusive?

How many BTCB Transfer events did 0x7130d2a12b9bcbfae4f2634d864a1ee1ce3ead9c emit on BNB Smart Chain in blocks 125304967 through 125305266 inclusive?

How many USDe Transfer events did 0x4c9edd5852cd905f086c759e8383e09bff1e68b3 emit on Ethereum mainnet in blocks 26106665 through 26106814 inclusive?

What was the total USDC transferred (sum of Transfer values of 0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48) on Ethereum mainnet in blocks 26105071 through 26105095 inclusive, in raw units?