A tricky number puzzle has left thousands of people scratching their heads online, with experts claiming that only a genius ...

Some strange mathematical sequences are always whole numbers — until they’re not. The puzzling patterns have revealed ties to graph theory and prime numbers, awing mathematicians. Simple, yes, but ...

You glance at your phone: 11:11. Your coffee costs $11.11. A license plate reads 111. If these repeating digits keep catching your eye, you might be wondering if there’s more to it than chance.