Assuming you mean 11.50-5.00 (e.g. hours of work or opening):
las doce menos diez (hasta = until) las cinco
Son las once y cinco = It's 11.05
Five is the complementary color to eleven.
It is eleven o five. or It is five past eleven (11:05)
10 o clock
son las cinco de la tarde/noche
(?) o (?)
ojo-eye opio-cellary Once-eleven
You can say, "five one-hundredths," or "five hundredths." You can also say "zero point zero five."
You can say "Tres o cuatro".
In English it's no & in Spanish its no (you say the N a little bit longer like nnn... o, and the 'o' is 'aw', a bit like the Scots 'o')
It could be O O five or zero zero five, which is more correct, though people often say O when it is actually a zero.
It is spanish, pronounced sink-o de may-o
the word for or in spanish is "o." Example: mas o menos (more or less)