64 Squares on a Draughts Board
4 S's in Assassin
I Saw Three Ships
12 seconds on the buzzer
19 a song by Paul Hardcastle
This is a Ditloid. The answer is 0 (zero) Sides on a Circle.
6 Stars in the Flag of Australia
X is 8 Points in Scrabble
10 = Downing Street (Residence of the British Prime Minister)
122 spaces in a Chinese checker board
39 Steps (movie by Alfred Hitchcock)
one sock in a shoe
64 squares on a checkerboard.