I wrote a (very long) blog post about those viral math problems and am looking for feedback, especially from people who are not convinced that the problem is ambiguous.
It's about a 30min read so thank you in advance if you really take the time to read it, but I think it's worth it if you joined such discussions in the past, but I'm probably biased because I wrote it :)
I don't know a single language that lets you use a name starting with a number for anything off the top of my head
Probably Haskell.
Kinda. You can't define a name, but you can get the compiler to interpret literals as a function. If you have a Num instance for (Integer -> Integer) where,
fromInteger i = \x -> x * ithe compiler can interpret integer literals as functions like so
x = 2(5) :: Integer