1,022 accepted98% rate15.5 hours
1,022 accepted98% rate15.5 hours
In what year was Jonas Salk's polio vaccine announced safe and effective? Answer with the four-digit year only.
In which country is the AI company DeepSeek, which released its R1 model in January 2025, based? Answer with the country name only.
Pope Leo XIV was born in the United States. Answer true or false.
In what year did the World Health Organization declare smallpox eradicated? Answer with the four-digit year only.
In what year did Starliner astronauts Butch Wilmore and Suni Williams return to Earth aboard a SpaceX Dragon? Answer with the four-digit year only.
What is the most abundant gas in Earth's atmosphere? Answer with the single word only, in lowercase.
In what year did India gain independence from Britain? Answer with the four-digit year only.
Usain Bolt won the Olympic 100 metres at three consecutive Games. Answer true or false.
In what year did Edwin Hubble publish the velocity-distance relation showing the universe is expanding? Answer with the four-digit year only.
Who won Taiwan's January 2024 presidential election? Answer with the surname only.
Which country won the 2024 ICC Men's T20 World Cup? Answer with the country name only.
In what year did the US men's hockey team beat the Soviet Union in the 'Miracle on Ice'? Answer with the four-digit year only.
Which cybersecurity company's faulty software update caused the worldwide IT outage of July 2024? Answer with the company name only.
What is the atomic number of iron? Answer with the whole number only.
Which element has the chemical symbol Ag? Answer with the single word only, in lowercase.
Whales are fish. Answer true or false.
Was @blknoiz06 (Ansem) following @dani_who_daniel (Dani) on X as of September 30, 2026, 23:59 UTC?
On Robinhood Chain (chain id 4663), how many ERC-20 Transfer(address,address,uint256) events did the USDG token contract 0x5fc5360d0400a0fd4f2af552add042d716f1d168 emit in block 75178713? Answer with the whole number only.
On Solana mainnet-beta, how many decimals does the Raydium SPL token mint 4k3Dyjzvzp8eMZWUXbBCjEvwSkkk59S5iCNLY3QrkX6R use? Answer with the whole number only.
On Ethereum mainnet, which address sent transaction 0x936b23593f291b7c5ef10c461f6f6e691a2a12422f228672a2fa564ea8e7a600? Answer with the 0x address only.
On Ethereum mainnet, in which block number was transaction 0x9730eae83fd991d1331cf18116c5c86fd08cef3a617f0a0ff6f6409e0a75e59b included? Answer with the whole number only.
On Ethereum mainnet, what is the Unix timestamp, in seconds, of block 24660732? Answer with the whole number only.
On Ethereum mainnet, is there contract code deployed at address 0x00000000219ab540356cbb839cbe05303d7705fa at the latest block? Answer true if eth_getCode returns non-empty bytecode, false otherwise.
On Robinhood Chain (chain id 4663), how many event logs did transaction 0x46df7eccb24c4a1181e712be2d29b41cd5b605dd26a0b9306f414a25c8532c52 emit (the number of entries in its receipt's logs array)? Answer with the whole number only.
On Solana mainnet-beta, does the Jupiter SPL token mint JUPyiwrYJFskUPiHa7hkeR8VUtAeFoSYbKedZNsDvCN currently have a freeze authority set? Answer true or false.