Only one person had/got a 'perfect score' on the test. [=only one person answered all the questions correctly]
If you're 'keeping score' at home, this is the third time that he has run for mayor and lost.
The 'score' was tied at 1–1 [=each team had scored one run] after the second inning.
(..) Dialogue: Marked=..,Default,NTP,!Effect,The Quaffle is released\Nand the game begins! Dialogue: Marked=..,Default,NTP,!Effect,Angelina Johnson scores!\NTen points for Gryffindor! Dialogue: Marked=..,Default,NTP,!Effect,Well done! Dialogue: Marked=..,Default,NTP,!Effect,Give me that! (..)2001 Harry Potter and the Sorcerer's Stone