'Thirty' in the Bible

He was thirty-two years old when he became king; and he was ruling in Jerusalem for eight years.

In the thirty-seventh year of the rule of Joash, king of Judah, Joash, the son of Jehoahaz, became king over Israel in Samaria, ruling for sixteen years.

In the thirty-eighth year of Azaliah, king of Judah, Zechariah, son of Jeroboam, was king over Israel for six months.

Shallum, the son of Jabesh, became king in the thirty-ninth year of Uzziah, king of Judah; and he was ruling in Samaria for the space of one month.

In the thirty-ninth year of Azariah, king of Judah, Menahem, the son of Gadi, became king over Israel, and was ruling in Samaria for ten years.

And Hezekiah, king of Judah, sent to Lachish, to the king of Assyria, saying, I have done wrong; give up attacking me, and whatever you put on me I will undergo. And the payment he was to make was fixed by the king of Assyria at three hundred talents of silver and thirty talents of gold.

Josiah was eight years old when he became king; and he was ruling in Jerusalem for thirty-one years; his mother's name was Jedidah, daughter of Adaiah of Bozkath.

And in the thirty-seventh year after Jehoiachin, king of Judah, had been taken prisoner, in the twelfth month, on the twenty-seventh day of the month, Evil-merodach, king of Babylon, in the first year of his rule, took Jehoiachin, king of Judah, out of prison;