The International Math Olympiad (IMO) is a brainy battleground where the world’s most talented teenage mathematicians wrestle with devilishly difficult math problems. It’s long been considered a ...
This is the question (warning, trying to solve it is both difficult and addictive): Albert and Bernard just met Cheryl. “When’s your birthday?” Albert asked Cheryl. Cheryl thought a second and said, ...
A ripple tells you something happened, but not exactly what. That is the core problem behind a hard class of equations that scientists use when they try to work backward from what they can measure to ...