He used 4 - 1 = 3 pounds of beef. So he used 3 * 2 = 6 pounds of vegetables.
The answer: 6
Reverse engineering the question: John buys 4 pounds of beef. He uses all but 1 pound in soup. He uses twice as many pounds of vegetables as beef. How many pounds of vegetables did he use?


Reasoning and answer: Since Pogo leaves 4 prints per meter, then over 6000 meters it would leave 4 * 6000 = 24,000 footprints on the soils of Mars. Grimzi leaves 3 prints per 6 feet, or 3 / 6 = 0.5 footprints per meter. Then over 6000 meters, Grimzi leaves 0.5 * 6000 = 3000 footprints on the sands of Pluto. In total, the two creatures will leave 24,000 + 3000 = 27,000 footprints.
The answer: 27000
What was the question?
Question: When Pogo, the four-legged martian, walks across the soft Martian soil, it leaves 4 footprints every meter. But Grimzi, the three-legged Plutonian, leaves only 3 footprints in the soft sands of Pluto for every 6 meters it walks. If Pogo travels 6000 meters across the soil of Mars, and Grimzi travels for 6000 meters across the fine sands of Pluto, what is the combined total number of footprints the two creatures will leave on the surfaces of their respective planets?


Marianne is 20 - 8 = 12 years older than Bella. Bella will turn 18 in 18 - 8 = 10 years. So, Marianne will be 20 + 10 = 30 years old then.
The answer: 30
Reverse engineering the question: Marianne was 20 years old when Bella was 8 years old. How old will Marianne be when Bella turns 18?


Reasoning and answer: First find what percent of the vinegar is still in the bottle after each year: 100% - 20% = 80%. Then multiply the amount of vinegar left after one year by the percentage left after each year to find how much is left after 2 years: 80% * 80% = 64%.
The answer: 64
What was the question?
Question: Anthony keeps a bottle of vinegar in his cupboard for 2 years. Each year 20% of the vinegar evaporates. What percent of the vinegar is left after 2 years?


There are 20 + 11 = 31 students in second grade. There are 31 x 2 = 62 students in third grade. In total, there are 31 + 62 = 93 students.
The answer: 93
Reverse engineering the question: There are 20 boys and 11 girls in the second grade and twice that number in the third grade. How many students are in grades 2 and 3?


Betty's daughter is 40 / 100 * 60 = 24 years younger than she is. That means her daughter is 60 - 24 = 36 years old. So the granddaughter is 1 / 3 * 36 = 12 years old.
The answer: 12
Reverse engineering the question:
Betty is 60 years old, and she is the oldest person in the family. Her daughter is 40 percent younger than she is, and her granddaughter is one-third her mother's age. How old is the granddaughter?