Balance-scale puzzles abound in recreational mathematics. The essential element is the humble two-pan balance scale — a staple of commerce over the millennia that’s still found in bustling rural ...

As we age, our ability to balance can change. And that loss of balance can pose a serious risk. In fact, the CDC says that falling down is the No. 1 cause of accidental death for those over 65 ...

A balance scale from the 19th century once used to weigh hundreds of millions of dollars’ worth of gold and silver is now being offered up at a Reno auction.

This puzzle was invented by the Russian mathematician Konstantin Knop, a world authority on coin-weighing puzzles.Many of his papers are in Russian, but you can find several coin puzzles (among other ...