For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

Maybe your rule isn’t 90 days. Maybe it’s 120. Maybe it’s six months,” the Minimalists say. The 80/20 rule dictates that your stuff should take up only 80 percent of a given space — a closet, a drawer ...

When it comes to investing, sometimes less is more. Following the 5% Diversification Rule helps you keep a more balanced ...

Use the Mulligan Rule to undo these seven costly retirement errors. While you can’t go back in time, some retirement choices ...

The COLA method can help identify whether you're operating on speculation, belief, evidence, or principle—and respond ...

Ever heard of the six-year rule? Buyers agents on social media call it one of “the most powerful wealth tools in Australian property” and for one particular group of first home buyers, “rentvesting on ...

Mathematician Grigori Perelman solved the Poincaré conjecture, and then rejected the $1 million prize that came with it.