Saturday Mac riddles 259

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

1: Thinly dispersed line of people saves space by excluding empty data.

2: Identical copy of document initially takes no space.

3: Stub of its former self lacks extent until it’s materialised.

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.