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 ...

Are odd numbers dominating our lives as Gregg Opelka writes in “The Odds Are Against Even Numbers” (op-ed, Dec. 26)? Well, we just enjoyed the 12 days of Christmas and will soon begin the election ...

What is the largest natural number possible? By using the word natural, I have ruled out the possibility that you simply answer infinity (∞) to torpedo the guessing game. But even if we allowed ...

What is the most bizarre real number that you can imagine? Probably many people think of an irrational number such as pi (π) or Euler’s number. And indeed, such values can be considered “wild.” After ...