'Fifty' in the Bible

And this is how thou shalt make it: the length of the ark three hundred cubits, the breadth of it fifty cubits, and the height of it thirty cubits.

And the waters prevailed upon the earth a hundred and fifty days.

and the waters returned from off the earth continually: and after the end of a hundred and fifty days the waters decreased.

And Noah lived after the flood three hundred and fifty years.

And all the days of Noah were nine hundred and fifty years: And he died.

Peradventure there are fifty righteous within the city: wilt thou consume and not spare the place for the fifty righteous that are therein?

And Jehovah said, If I find in Sodom fifty righteous within the city, then I will spare all the place for their sake.

peradventure there shall lack five of the fifty righteous: wilt thou destroy all the city for lack of five? And he said, I will not destroy it, if I find there forty and five.