Posted by Jennifer DeMain on .
A jar of marbles is half red, one third green and the rest blue. If eight marbles are green how many are blue?

Math 
Reiny,
total  x
red  x/2
green  x/3
blue === y
y + x/2 + x/3 = x
y = x  x/2  x/3
y = x/6
so one sixth are blue