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

1: First unknown cipher now with playgrounds for 12-year olds.

2: PBX came from next only to merge to form 1 three years later.

3: Studio for coding waterproofs first in Pascal will be 40 this September.

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.