10 = Downing Street (Residence of the British Prime Minister)
Four strings on a double bass.
4 S's in Assassin
I Saw Three Ships
This is a Ditloid. The answer is 12 sides on a dodecagon.
A Social Security Number has 9 Digits
1st March = Saint Davids Day Gavin.
It's a Ditloid. 180 Maximum Score in Darts.
12 seconds on the buzzer
10 Perfect Score in a Gymnastics Event
19 a song by Paul Hardcastle
64 Squares on a Draughts Board
This is a Ditloid. The answer is 0 (zero) Sides on a Circle.