HHC2021 Bob's Calculator Challenge

[Paul Dale]

I manged a definite three correct (shortest model lifetime, most used model number and most colours of keys). The negative zero question: I'd have given an answer that was correct but not what expected (honestly, I didn't know that that answer was even possible). There were another couple I might have guessed if I had to commit to an answer at the time rather than leaving blank in the hopes of remembering.


Bob, thanks for a proper challenge. This was not in the slightest bit easy.

Pauli