Reasoning and answer: A bird eats 7 x 4 = 28 berries in 4 days. So, 5 birds can eat 28 x 5 = 140 berries in 4 days.
The answer: 140
What was the question?
Question: A bird eats 7 berries a day. Samuel has 5 birds. How many berries do Samuel's birds eat in 4 days?


Their 1st child was born 15 years ago, and therefore is 15 years old. Their 2nd child was born 1 year after their 15 - year - old child, and therefore is 15 - 1 = 14 years old. Their 3rd child was born 4 years after their 14 - year - old child, and therefore is 14 - 4 = 10 years old. Their 4th child was born 2 years after their 10 - year - old child, and therefore is 10 - 2 = 8 years old.
The answer: 8
Reverse engineering the question: Jolene and Phil have four children, each with the same birthday. They gave birth to their first child exactly 15 years ago. They gave birth to their second child exactly one year after the birth of their first child. They gave birth to their third child on the fourth birthday of their second child. Two years after the birth of their third child, they gave birth to their fourth child. How old, in years, is their fourth child?


Reasoning and answer: 4 jugs contain 4 * 5 = 20 liters of water. 2 bucket contains 20 * 2 = 40 liters of water.
The answer: 40
What was the question?
Question: A jug is filled with 5 liters of water and a bucket is filled with 4 jugs. How many liters of water are contained in 2 buckets?


There are 12 inches in 1 foot and her room height is 8 feet so that's 12 * 8 = 96 inches tall. She wants an additional 5 inches of material added so the 96 inch long curtains will pool so she needs 5 + 96 = 101 inch long curtains.
The answer: 101
Reverse engineering the question: Cynthia wants floor-to-ceiling curtains made with an additional 5" of material so it will pool at the bottom. If her room is 8 feet tall, how long will the curtains need to be?


Reasoning and answer: First find Bill's height by dividing Cary's height by 2: 72 inches / 2 = 36 inches. Then add six inches to find Jan's height: 36 inches + 6 inches = 42 inches.
The answer: 42
What was the question?
Question: Cary is 72 inches tall. Her younger brother Bill is half her height, and her younger sister Jan is 6 inches taller than Bill. How tall is Jan?


Reasoning and answer: 30 x 2 / 5 = 12 members ordered lemon juice. So, 30 - 12 = 18 members did not order lemon juice. Since 1 / 3 of the remaining ordered mango juice, then 18 x 2 / 3 = 12 members ordered mango juice. Therefore, 18 - 12 = 6 members ordered orange juice.
The answer: 6
What was the question?
Question:
A club with 30 members ordered fruit juices. Two-fifths of them ordered lemon juice. One-third of the remaining members ordered mango juice, and the rest ordered orange juice. How many members ordered orange juice?