Missing Condition Natalia sold 48 clips in April and half as many clips in May. How many clips did Natalia sell altogether in April and June? We don't know anything about June, so it's impossible to ...

Is there an infinity of infinities? The question sounds almost absurd, like a child’s riddle meant to twist your brain into knots. But for mathematicians, it’s a serious (and endlessly fascinating) ...

Researchers have used metamathematical techniques to show that certain theorems that look superficially distinct are in fact logically equivalent.

Journal Editorial Report: The week's best and worst from Kim Strassel, Jason Riley and Dan Henninger. Remember when the University of California kicked off a trend by eliminating the SAT test as an ...

How do opinions form and change in large groups of people? That's not just a sociological question, it's a mathematical one. Ph.D. candidate Federico Capannoli studied opinion dynamics. He defended ...

For the past several years, America has been using its young people as lab rats in a sweeping, if not exactly thought-out, education experiment. Schools across the country have been lowering standards ...