Nowadays, it seems that we cannot do anything without passwords. Experts constantly warn us to be careful about using passwords that can be easily figured out by bad actors, advising us to create long ...

Here’s a famous teaser that I don’t really like much: What number comes next in the sequence 8, 5, 4, 9, 1, 7,…? It’s not so obvious. It becomes a little easier when we write the sequence in words: ...