Q: A grocery store has 4 kinds of jelly. They sell grape jelly twice as much as strawberry jelly, and raspberry jelly twice as much as plum jelly. The raspberry jelly sells a third as much as the grape jelly. If they sold 6 jars of plum jelly today, how many jars of strawberry jelly did they sell?
A: They sell twice as much raspberry jelly as plum jelly, so they sold 2 * 6 = 12 jars of raspberry jelly today. The raspberry jelly sells a third as much as the grape jelly, so they sold 12 * 3 = 36 jars of grape jelly today. The grape jelly sells twice as much as the strawberry jelly, so they sold 36 / 2 = 18 jars of strawberry jelly today. The answer is 18.

Q: The ratio of cows to bulls in a barn is 10:27. If there are 555 cattle on the farm, how many bulls are on the farm?
A: The total ratio of cattle on the farm is 10 + 27 = 37. Since the fraction that represents bulls from the total ratio is 27 / 37, the number of bulls on the farm is 27 / 37 * 555 = 405. The answer is 405.

Q: Mark made a chalkboard that is 3 feet wide. It is 2 times as long as it is wide. What is the area of the chalkboard?
A:
The length of the chalkboard is 2 x the width of 3 feet = 6 feet. We can calculate area by multiplying the width and the length, so 3 feet x 6 feet = 18 feet. The answer is 18.