Saturday Mac riddles 257

Here are this weekend’s Mac riddles to entertain you through family time, shopping and recreation.

1: Candela, toxic metal, optical spinner, and 205.

2: Bounder for industrial design, once from Claris, and 3245.

3: Risky precursor to USB for a coach on your working area, and 2779.

This weekend, calculators are encouraged. To help you cross-check your solutions, or confuse you further, there’s a common factor between them.

I’ll post my solutions first thing on Monday morning.

Please don’t post your solutions as comments here: it spoils it for others.