You had it right. It is forty.
Forty three
Forty.
five-hunderd forty-eight
Three hundred and forty-nine.
forty, forty-one, forty-two, forty-three, forty-four, forty-five, forty-six, forty-seven, forty-eight, forty-nine, fifty
The number is spelled "forty" everywhere in English.
Forty = vierzig
forty three
In British English: "Three hundred and forty-six thousand, seven hundred and twenty-one" In American English: "Three hundred forty-six thousand, seven hundred twenty-one"
That is the correct spelling of "forty" (40).
forty
The number is three hundred and forty-two point nine seven or in money it is (for example) three hundred and forty-two dollars ninety-seven cents