DataDave said:

One habit that pays for itself: post the method alongside the number.

Worth saying that the confident version of this is more useful to the person writing it than to the person reading it.

Happy to go further on any of that.

DataDave said:

One habit that pays for itself: post the method alongside the number.

That is right for the common case. Whether it is right for the case being asked about depends on a detail that has not been given.

DataDave said:

One habit that pays for itself: post the method alongside the number.

This is exactly what I could not find anywhere else. Sending this to two other people who asked me the same thing last week.

Adding the clinical framing, because it changes how the question reads. Take it one variable at a time. Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent argument can untangle them after the fact.

claudia_zurich said:

Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent…

Second this.