A deceptively simple math problem has left the internet stumped, proving it may be far trickier than it appears at first glance. The mathematical brain teaser, posted Friday by X user @BholanathDutta, ...

New Yorker writer Helen Rosner recently shared an image from a math workbook that her friend was working on with their child. The friend, an MIT grad, was stumped. “Neither he nor I have even the ...