How do you work out a happy number?

Well if you mean positive then yes a positive times a positive is always a positive! Those numbers always have their calculators half full :)

It is somewhat complicated; so I want to point out to the Wikipedia article that explains it: http://en.wikipedia.org/wiki/Happy_numberThe origin of the name "happy" is not explained there, it seems;...

A number is prime if is has exactly two unique positive factors, the number 1 and itself. E.g. 5, 7 and 11 are all prime numbers. The number 1 is not prime. However, 15, for example, is not prime...

it depends on where you work and how you perceive it's value. So doing something you love, should keep you happy (generally speaking).

Yes, because Jonny is a lanky git and he touches himself