3 Primary Colours - Blue, Red, and Yellow
3 Point Basket
7
a perfect game in bowling
This may no longer apply but the Ditloid answer is 12 Provinces of Canada. NOTE There used to be 10 provinces and 2 territories - now increased to 3.
4 Cardinal Points of the Compass
3 peas in a pod
9 players on a baseball field
2 Point Four Children
13 Hearts in a Pack of Cards.
8 = Points for potting the black. What sport is that in?
p=b+3a+c p-3a-c=b+3a-3a+c-c p-3a-c=b b=p-3a-c
Blackbirds Baked in a Pie. Should really be 4 and 20!