6. One third of the animals in Jacob's flock are goats, the rest are sheep. There are twelve more sheep than goats.
How many animals are there altogether in Jacob's flock?
A 12
B 24
C 36
D 48
E 60
6. C Let $g$ and $s$ be the number of goats and sheep respectively. Then $s=2 g$ and $12=s-g=2 g-g=g$. Hence the number of animals is $s+g=3 g=36$.