Saturday Mac riddles 312

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

1: Border lake claims it’s both 10 and 1A.

2: Clearly a new material comes with concentricity.

3: Patented in 1876, it’s finally on its way to our Macs.

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.