How to pronounce this number?

It depends heavily on the context; one of them being American or British. Since I'm an American English speaker, I'll explain accordingly to AmE. (The hyphens in my explanation are not mandatory; correct me if I'm wrong.) 1. YEARS Separate the four digits into two pairs of two, unless the middle two digits are both zeroes. 1751 = Seventeen fifty-one 1984 = Nineteen eighty-four 2006 = Two-thousand (and) six 5012 = Fifty twelve 2. PHONE NUMBERS Read number by number. Zeroes are normally read as 'o(h)'. 2156 = Two-one-five-six 7049 = Seven-o-four-nine 3. FOUR-DIGIT NUMBERS This may be different according to culture, person, and whatsoever, but the normal way of reading is using thousands, hundreds, tens, and ones individually. However, some people would read the first two digits with hundreds. 1200 = One-thousand (and) two-hundred OR Twelve-hundred 2317 = Two-thousand three-hundred (and) seventeen OR Twenty-three-hundred (and) seventeen Hope this helps, and if I find something I missed, I'll make sure to add it!

5,268 - Standard: Five thousand two hundred sixty-eight - If it’s a year: Fifty-two sixty-eight

The first one (hundred, no 's') if it's a quantity. The second one if it's an address or the phone number

Either way, depending on context. And in AmE at least, it would be “two hundred~~s~~.”

Five thousand two hundred and sixty eight. With or without “and” is still acceptable. You may also hear people say Fifty two hundred and sixty eight

Depends on context. If it's an identifier, like a house number or part of a phone number, it would usually be "fifty-two sixty-eight," or even "five-two-six-eight". If it's a year, only the former. If it's an actual quantity, like an amount of dollars, it would be "five thousand, two hundred [and] sixty-eight," or less commonly "fifty-two hundred [and] sixty-eight."

"Five thousand, two hundred and sixty-eight". (You can drop the *and* in American English). If you're quoting a date, an address or a phone number: "Fifty-two sixty-eight"

Theyre both fine. Neither is wrong but it might sound a bit strange depending on the context, due to conventions around when you use which If its in a proper sentence surrounded by words, you usually read out "five thousand, two hundred..." In full If youre reading back a string of numbers, like in a phone number, serial number, etc, most people would say the short form "the numbers number is: one five nine, five six eight, fifty two sixty eight." [+1-156-568-5286]

Five thousand, two hundred, and sixty-eight. Fifty-two hundred and sixty-eight. Fifty-two, sixty-eight. Are all valid pronunciations, and ordered from most to least common (at least, in my personal usage.) A note, though, that it's hundred, singular. It's not plural.

The first option is correct, but it is "hundred", not "hundred**s**". No "s".

In British English, it's five thousand, two hundred and sixty-eight. Americans leave out the "and" before sixty-eight, but "hundred" is always used, not "hundreds".

If you weren't going to say the exact number and were going to give a range you could also say "between fifty two and fifty three hundred." I wouldn't usually use that construction for a more complicated number.