For the sake of learners who have no idea where that quote about blackbirds sprang from, there is an English nursery rhyme which begins:
Sing a song of sixpence
A pocket full of rye.
Four and twenty blackbirds
Baked in a pie.
When the pie was opened,
The birds began to sing.
Wasn't that a dainty gift to set before the King!
There are more verses!
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Of course, the Germans still use this form vier und zwanzig for twenty four, normally. I wonder if there's a link.
But 'Sing a Song of Sixpence" is definitely English.
I remember a very rude song from my youth, entitled "The Ball of Kirriemuir". One verse detailed the unfortunate fate which befell the "four-and-twenty maidens" who "came down from Inverness" to attend.....
I'm not a teacher of English, but I have spoken it for (almost) all of my life....
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
The 'five and twenty' type construction was only ever used of 'X and ....ty' numbers from 21 to 99, never of hundreds and thousands. Jane Austen, writing in the early nineteenth century, used it, but I don't think it was used in everyday language long after that. It survived into the present day only in traditional songs and poems, in the clock times already mentioned and, possibly in some rural dialects.
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I don't know how you came to the conclusion that "five and hundred" could be 150 based on what you've read here.
Basically, as far as I am aware, 25 is the only number that seems to take this rather old-fashioned construction and you won't hear it at all from the younger generations (sorry, 5jj!)
Five and twenty = 25
Five and twenty thousand = 25,000
Five and twenty million = 25, 000
I certainly don't recall my grandfather ever saying "three and twenty" for 23 or anything similar. When telling the time, he wouldn't have said "It's eight and twenty past two" but he would have said "It's five and twenty past two". That is no different in the up-to-date construction. We don't say "It's twenty-eight past two", but we do say "It's twenty-five past two".
If I were you, I would stop worrying about it. Accept that perhaps a couple of times in your life, you might hear someone say "five and twenty" to mean 25. The nursery rhyme we quoted is a bit of an anomaly and I would say it was done to fit the rhythm of the line, because "Four and twenty blackbirds baked in a pie" has the right number of syllables, whereas "Twenty four blackbirds baked in a pie" doesn't.
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