He bought 5 * 4 = 20 pounds of beef. So he paid 20 * 5.5 = $110.
The answer: 110
Reverse engineering the question: James buys 5 packs of beef that are 4 pounds each. The price of beef is $5.50 per pound. How much did he pay?

If Matthews has 60 cows, Aaron has 4 * 60 = 240 cows. Together, Aaron and Matthews have 240 + 60 = 300 cows. Since Marovich has 30 fewer cows than the combined number of cows that Aaron and Matthews have, Marovich has 300 - 30 = 270 cows. Altogether, the three have 270 + 300 = 570 cows.
The answer: 570
Reverse engineering the question: Aaron has four times as many cows as does Matthews. Together, they have 30 more cows than Marovich. If Matthews has 60 cows, how many cows do the three have altogether?

If there are 3 identical cylindrical structures, with a combined total of 72 rooms, then each individual cylindrical structure contains 72 / 3 = 24 rooms. In each 24 - room cylindrical structure, there are 24 - 12 - 7 = 5 kitchens. Thus, the entire, three - cylinder space station contains a total of 3 * 5 = 15 kitchens.
The answer: 15
Reverse engineering the question: The space station, Lupus-1, is an enormous spacecraft made up of three identical cylindrical structures that house the living quarters for the crew.  The three cylindrical structures are linked together by a series of tunnels that hold them together and allow the crew to move between cylinders. Each cylindrical structure contains 12 bedrooms, 7 bathrooms, and several kitchens. If the entire space station has 72 rooms, how many kitchens are there on the entire space station?

His partner has been teaching for 40 - 10 = 30 years. So together they have 40 + 30 = 70 years of experience.
The answer: 70
Reverse engineering the question:
James spends 40 years teaching. His partner has been teaching for 10 years less. How long is their combined experience?