'Twenty' in the Bible

A son of twenty and one years is Zedekiah in his reigning, and eleven years he hath reigned in Jerusalem, and the name of his mother is Hamutal daughter of Jeremiah of Libnah.

This is the people whom Nebuchadrezzar hath removed: in the seventh year, of Jews, three thousand and twenty and three;

And it cometh to pass, in the thirty and seventh year of the removal of Jehoiachin king of Judah, in the twelfth month, in the twenty and fifth of the month, hath Evil-Merodach king of Babylon lifted up, in the year of his reign, the head of Jehoiachin king of Judah, and bringeth him out from the house of restraint,