'One' in the Bible

In the seventh month, on the one and twentieth day of the month, came the word of Jehovah by the prophet Haggai, saying,

If one bear holy flesh in the skirt of his garment, and with his skirt do touch bread, or pottage, or wine, or oil, or any food shall it become holy? And the priests answered and said, No.

And Haggai said, If one that is unclean by a dead body touch any of these, is it become unclean? And the priests answered and said, It shall be unclean.

before those days were, when one came to a heap of twenty measures, there were but ten; when one came to the vat to draw out fifty press-measures, there were but twenty.

and I will overthrow the throne of kingdoms, and I will destroy the strength of the kingdoms of the nations; and I will overthrow the chariots, and those that ride therein; and the horses and their riders shall come down, every one by the sword of his brother.