Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

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.

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, ...

Have you ever noticed certain numbers appearing repeatedly in your life? Perhaps you glance at the clock, and it always seems to say 11:11, or you keep seeing the number 222 on license plates, ...

Pine cones. Stock-market quotations. Sunflowers. Classical architecture. Reproduction of bees. Roman poetry. What do they have in common? In one way or another, these and many more creations of nature ...

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 ...