International Standard Version Hezekiah began his reign at the age of 25. He reigned for 29 years in Jerusalem. His mother's name was Abijah, Zechariah's daughter.
American Standard Version Hezekiah began to reign when he was five and twenty years old; and he reigned nine and twenty years in Jerusalem: and his mother's name was Abijah, the daughter of Zechariah.
Young's Literal Translation Hezekiah hath reigned -- a son of twenty and five years, and twenty and nine years he hath reigned in Jerusalem, and the name of his mother is Abijah daughter of Zechariah;