In what year did Croatia join the European Union?

In what year was the Schengen Agreement signed?

How many cantons does Switzerland have?

How many sovereign countries are in South America?

How many countries are in Central America?

How many regions does Italy have?

How many Great Lakes are there in North America?

How many boroughs does New York City have?

How many prefectures does Japan have?

How many UN member states share a land border with Russia?

How many countries share a land border with Germany?

In what year was the African Union launched, replacing the Organisation of African Unity?

In what year was Nelson Mandela released from prison?

In what year was the US Voting Rights Act signed into law?

In what year was the 22nd Amendment to the US Constitution ratified?

To how many terms can a person be elected President of the United States under the 22nd Amendment?

In what year was Joe Biden inaugurated as President of the United States?

In what year did Angela Merkel leave office as Chancellor of Germany?

In what year did Narendra Modi first become Prime Minister of India?

In what year did Solana's mainnet beta launch?

In what year was Vladimir Putin first inaugurated as President of Russia?

In what year did Xi Jinping become General Secretary of the Chinese Communist Party?

How many bytes long is a Keccak-256 hash?

In what year did the US SEC approve the first spot Bitcoin ETFs?

Which EIP number introduced Ethereum's base fee that is burned, activated in the London upgrade?