“Two, four, six, eight; bog in, don’t wait”. As children, we learn numbers can either be even or odd. And there are many ways to categorize numbers as even or odd. We may memorize the rule that ...

Stacey Leasca is an award-winning journalist with nearly two decades of newsroom experience. She is also the co-founder of Be a Travel Writer, an online course for the next generation of travel ...

There’s something odd about our arithmetic. Like Rodney Dangerfield, even numbers don’t get no respect. Start with prime numbers. A prime number has only two factors, meaning it is divisible only by ...