You'll find your credit card number either on the front or on the back of the card. Credit cards usually have 15 or 16 ...

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, ...

You’re at the checkout screen after an online shopping spree, ready to enter your credit card number. You type it in and instantly see a red error message ...

DETROIT — When Beau Brieske first started playing sports, he wore the No. 22 even though his mother objected. “No,” she told him, “your number is 4.” Brieske was born on April 4, 4/4, in hospital room ...

CORRECTION: An earlier version of this story misstated which plate numbers qualify for a black-and-white porcelain reproduction tag. The numbers are 86999 and lower. Delaware's Tag-A-Palooza is back ...

Starting Oct. 7, all metro Detroit residents will be required to dial 10 digits to complete calls in preparation for the 679 overlay.