Whose portrait appears on the obverse of the US one-cent coin? Answer with the surname only.
In what year did the Mannequin Challenge go viral? Answer with the four-digit year only.
In what year did Max Planck introduce the quantum of action? Answer with the four-digit year only.
Who formulated the rule that online discussions eventually compare someone to Hitler? 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.
The mint mark 'P' stands for Denver. Answer true or false.
In what year did Tay Zonday's 'Chocolate Rain' go viral? Answer with the four-digit year only.
What percentage silver are US dimes and quarters minted before 1965? Answer with the whole number only.