[cabalamat]

> The first thing the interviewer should do is lay off the pressure not turn it on. Seniors and Out of Job People tend to freak.

If I was at a job interview and was asked these sort of puzzles, I wouldn't feel under pressure. Instead I'd think "Cool, I like solving puzzles! And I'm good at it too so this is a chance to make a good impression." Maybe Google are looking for potential employees with that attitude?