Someone else may step in and be more precise, but I think you need to do Save Default (from toolbar)

Come on William. You introduced the topic, and I have spent some time on it, as you can see.
Have you no comments?

William, let's look at your maths in your last post.

We agree that, using normal nomenclature:
P-Q/2=n!. . . .(1)
P/2 -Q/2 = n. . . (2)
From which:
P=2(n!-n) . . .. (3) and
Q=2(n!-2n). . . (4)

You have tabulated several values of P and Q derived using those equations..

You have gone on to show that in each example, the end result is what you expected.

Let's look at it another way.
P-Q/2 = 2(n!-n) -2(n!-2n)/2 = 2n!-2n-n!+2n = n!
and
P/2-Q/2 = 2(n!-n)/2 -2(n!-2n)/2 = n!-n -n! +2n = n

Great result, except that is where you started from. You have merely proved your arithmetic has been faultless, so the results are not interesting!

If n = an integer value of x, and if there are no exceptions to the process, the two results for (1) and (2) are always x! and x, respectively.

E&OE

This is not called up by the original expression, and is a misreading of the convention. Effectively, you have introduced it as a red herring. Of course, the rhs in the given expression would become:
(230-220)/2 = 5.
This solution is a non-starter, except for an eccentric.

The accepted general convention is as the second:

,
so the rhs becomes:
230 - (220/2) = 230-110 = 120, which is 5!

p.s. As this is a "nice" forum, it might be y's to mind our p's and q's!

Why?

I've only just noticed this thread - I think my machine was non compos mentis when it was posted.

I got quite indignant at first, until I noticed the twist. Very clever, bringing the mathematically knowledgeable down a peg.

Interesting philosophical point here, mixing maths and text!

Yes, you are correct, Liverpool St Station is in the City; its postal code is EC2.
As a Londoner until I was married at 22, living in Stoke Newington (N16), and often travelling to Shepherds Bush (W12), I thought of Liverpool St Station as being on the East side of London - after all, it is close to Bethnal Green and Shoreditch, which I thought of as really East End places.

Dirty Dick's was, as I remember, and I suppose is, located across the road from the SE entrance to the station, so we certainly are talking about the same place. The station was convenient for both Metropolitan and Central Line undergrounds (Can't call the Met a tube line, as it was mainly cut and cover). And, with stations in Shepherds Bush, each end of the green triangle in Shepherds Bush.

As a youngster, on occasion, I would go down to Shoreditch to buy a bottle of "Best Button Polish" which my cabinet maker father would use to finish off a piece of furniture. Although he was described as a Journeyman, he really was a craftsman.  I have a bedroom suite made by him for himself and his new wife back in about 1935. There is a huge drawer in a chest of drawers, full of blankets, which I used to be able to push in  by pressing on one corner of the drawer, with my little finger. I can't do it now, not because the drawer has stuck, but because my little finger is weak.

I and my new wife moved away from London, to begin a new life out of town in Harlow, Essex, eventually gravitating to our present home on the South Coast.

I've forgotten it, so I shall have to look it up again.
Sorry.

I've had a lot of bother lately. First my desktop wouldn't turn on - due to blown electrolytics. Substituted older psu - nominally same spec, but terrible tendency to not come on or to cut out. Had to power hard drives from ancient straight transformer rectifier psu. Computer guru swapped old psu for modern more powerful version- done the trick. Also, my main data storage drive wasn't seen by the pc, and it turns out to have a blown chip. Thank goodness, the control card is joined to the HD body by a set of pressure contacts, and my computer guru says that I can put in a card from an identical HD, buying on line, no soldering required. That might do the trick. Otherwise, its off to a data retrieval firm. Cost!!!

Simultaneously, my household CH & HW system gave up, and that nice plumber had to come round for several days. He had to replace the pipe runall the way through the house from the cold water header tank in the loft to the downstairs HW cylinder, and later we had to change the motor head on the HW-boiler-to-cylinder cut off valve, and then we found the pump impeller had frozen. He couldn't get to old pump body out - threads really immoveable. But as it was the same make and model pump he was able to swap the motor impeller head. All lovely now.

This is also well known  in this version:

You’re in a room with two doors. There’s a guard at each door. One door is the exit, but behind the other door is something that will kill you. You’re told that one guard always tells the truth and the other guard always lies. You don’t know which guard is which. You are allowed to ask one question to either of the guards to determine which door is the exit.

What question should you ask?

There are two solutions to this problem, and the second is so different and is not normally given that I will post it in a few days if no-one tells it first.