Whenever you look at a clock, do you always see the same time? It might be 11:11 or 3:33. Maybe repeating numbers have made their way into other aspects of your life, such as a receipt that totaled ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." [table-of-contents] stripped You look at the clock, and it’s showing 7:17. That’s when you realize that ...

Unless you're playing the lottery or suffer from hexakosioihexekontahexaphobia (fear of the number 666), you're unlikely to give much thought to the meaning behind numbers. But some believe numbers ...

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.

In your life, are things seemingly moving so fast-paced that you don't even have a chance to think? While this is happening, is the number seven making repetitive and frequent appearances on ...

1, 11, 21, 1211, 111221. These are the first five elements of a number sequence. Can you figure out what comes next? If you're trying a bunch of arithmetic operations to make the numbers work, you're ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...