This calculation can be useful, for example, if you are deciding on the number of sportspersons selected (or rejected) for an event or the number of products approved selected or rejected for export.

The original version of this story appeared in Quanta Magazine. A new proof has brought mathematicians one step closer to understanding the hidden order of those “atoms of arithmetic,” the prime ...

3 ways to count the number of occurrences of a specific word or phrase in a Word document Your email has been sent With three ways to count specific words in a Word document, you’re bound to find at ...

How to conditionally count the number of times any value occurs in Excel Your email has been sent Specifying the conditional count of a value sounds like a daunting task, but two Excel functions make ...

A basic feature of number theory, prime numbers are also a fundamental building block of computer science, from hashtables to cryptography. Everyone knows that a prime number is one that cannot be ...