I believe that most of the time, it is advised to write out figures as words in novels, rather than writing the actual figure. E.g. He's twenty years old. He lives on the fourth floor.
However, are there times when writing the actual figure is best?
For example, telling the time. Is it better to write:
4 p.m. or Four p.m.
The latter just looks weird to me, but I believe it would be better to write it like that.
How about if you wrote something referencing the actual digital numbers you see:
I glance at the alarm clock: 3.30 a.m.
Would that be acceptable?
I imagine heights should be written out? E.g. They're both about six foot two.
Once again, it feels more natural to me to write They're both about 6'2", but I think the former is better in a novel or perhaps I'm mistaken?
What about in the following example where you actually reference a number:
We arrive at the door with the number 45 carved into it.
(should it be forty five or is either okay?)
Should all the following be written out in words:
His 1970's Jaguar (his nineteen-seventies Jaguar)
80's pop music (eighties pop music)
Once again, I feel like the figures look better, but perhaps that is just not the done thing in novels.
Any thoughts would be greatly appreciated!