So for at least China and Japan, and probably most other countries, arabic numerals must be used, making them almost certainly universal in math equations.
As far as I know, the arabic numerals are used in every country on Earth. No exceptions. They may also use other numerals in certain circumstances but they all use arabic numerals. And everyone learns them in school. The only people who don’t use them are isolated, such as the Sentinelese and the Pirahã.
BTW, as far as the “moving the goalposts” thing, I’m fairly sure I didn’t actually do that. If you read only my posts, you won’t find it. Some other people, likely including yourself, made some assumptions about the topic that went beyond what I said. However, it’s still at least partially my fault for not explaining what I meant better.
Speaking as a Hindu, I should hope that educated Hindus would recognize that a Swastika is a Nazi symbol except in circumstances in which it’s clear it’s being used as a Hindu symbol.
A pointing finger.
See one of those on a sign and you know that there’s something in that direction. Oftentimes you can figure out based on context what that something is without being able to understand any writing or signage associated with it.
Knowing and misinterpreting/ignorance are two different things. It may be because of my search history, but this is the top link when I Google swastika:
"swas·ti·ka
/ˈswästəkə/
noun
an ancient symbol in the form of an equal-armed cross with each arm continued at a right angle, used (in clockwise form) as the emblem of the German Nazi party."
Edit: The second link is to the Wikipedia article that shows both clockwise and anti-clockwise examples of the religious swastika and the canted Nazi swastika.
OP clarified that the intent of this thread is symbols, not gestures like V for Victory/Peace.
I’m not sure what your point is.
In terms of the meaning of the swastika, it’s a matter of context, not its direction or orientation.
The direction and orientation of the Nazi swastika IS critical. With the exception of ancient representations, AFAIK, the Hindu swastika and Buddhist wan zi/manji is NEVER at an angle. Hitler must have known this and purposely canted the Nazi version.
“The Nazis’ principal symbol was the hakenkreuz, “hooked-cross” (which resembles the Swastika) which the newly established Nazi Party formally adopted in 1920.[3] The emblem was a black swastika (卐) rotated 45 degrees on a white circle on a red background. This insignia was used on the party’s flag, badge, and armband. Similar shaped swastikas were seen in United States postcards wishing people good luck in the early 1900s.[4][5]” My emphasis.
https://en.wikipedia.org/wiki/Swastika
Less villianized is the inverted cross which as I stated above is now often associated with Satanism, though historically it’s the Cross of Peter. If I were a follower of a church that used that cross as a religious symbol, I’d be highly insulted if someone thought I was a follower or Satanism.
I’ll leave the last word to you or anyone else that may choose to comment on my posts as I see I’m banging my head against a brick wall.
I’m sorry but this is untrue. Nazis used and neo-Nazis use the symbol in all kinds of ways.
Official uses tended toward a pattern but not because that was the only pattern that symbolized Nazi-ism big because like any organized institution, it made sense to follow a style guide. That didn’t mean that swastikas in different formats didn’t indicate Nazism.
And that last statement about Hitler must have known and so rotated the symbol is nonsense. Hitler didn’t need to distinguish the Nazi party symbol from Hindu and Buddhist uses. But the party was good at propaganda so made sure everything looked cool.
What you’re doing is drawing false conclusions from faulty premises.
Index finger pointing isnot universal, there are cultures that consider it rude and use thumb pointing, whole-hand pointing or other variations.
Since this thread is supposed to be about graphic images and not gestures, I thought this reference was to pointing fingers that used to be somewhat common on late 19th/early 20th century posters and advertisements.
FWIW, I was clearly referencing pointing fingers as used on signs. As in:
This way to the egress. 
I was thinking an face with x’s for eyes would be universal for death/poison/warning, but apparently the emoji’s for this generally mean dizzy (huh?) or shock.
That was what I understood, too. I’m just pointing out that they wouldn’t be universally understood.
In Poland the Symbol for the male washromm is a equilateral triangle pointing down and for the females it is a circle (or ws it the other way around?), so not universal.
OK, those would totally confuse me, since I’ve never been to Poland. But wouldn’t almost all Poles still recognize the symbols we use in the rest of Europe (and most of the world)?
(Insert Pole joke here.)
I don’t know, but they sure have a lot of fun with drunk tourists in bars around there.
(The only Pole joke I remember only works in German, sorry. Believe me, it is better that way 
Except in case you admit jokes about the former Pope as Pole jokes, there I remember a couple.)
That culture is the USA. It’s amusing how that American characteristic always seems to be blamed on ‘other’ cultures.
That’s why they are almost universally recognized 
Even when pointing out directions, inanimate objects and such? I always thought the rude thing was to point straight at you! Only Uncle Sam does that! 