First find the total number of ducklings the first two ducks have: 2 ducks * 5 ducklings / duck = 10 ducklings. Then find the total number of ducklings the next six ducks have: 6 ducks * 3 ducklings / duck = 18 ducklings. Then find the total number of ducklings the last 9 ducks have: 9 ducks * 6 ducklings / duck = 54 ducklings. Then add up all the ducks and ducklings to find the total number: 10 ducklings + 18 ducklings + 54 ducklings + 2 ducks + 6 ducks + 9 ducks = 99 ducks.
The answer: 99
Reverse engineering the question: Mary sees a flock of ducks crossing the street. There are 2 ducks with 5 ducklings each, 6 ducks with 3 ducklings each, and 9 ducks with 6 ducklings each. How many ducks and ducklings are there total?

First calculate the volume of the aquarium by multiplying its length, width and height: 4 ft * 6 ft * 3 ft = 72 cubic ft. Then figure out what proportion of the aquarium is full after the cat knocks it over: 1 / 2 * 1 / 2 = 1 / 4. Then figure out what proportion of the aquarium is full after Nancy refills it: 3 * 1 / 4 = 3 / 4. Now multiply the proportion of the aquarium that's full by the aquarium's volume to find out how much water is in it: 72 cubic ft * 3 / 4 = 54 cubic ft.
The answer: 54
Reverse engineering the question: Nancy is filling an aquarium for her fish. She fills it halfway and goes to answer the door. While she's gone, her cat knocks the aquarium over and spills half the water in it. Then Nancy comes back and triples the amount of water in the aquarium. If the aquarium is 4 feet long, 6 feet wide, and 3 feet high, how many cubic feet of water are in the aquarium?

She sold 60 * 1.50 = 90 boxes on Sunday. The total is 60 + 90 = 150 boxes.
The answer: 150
Reverse engineering the question: Tanika is selling boxes of crackers for her scout troop's fund-raiser. On Saturday, she sold 60 boxes. On Sunday, she sold 50% more than on Saturday. How many boxes did she sell, in total, over the two days?

Natalie's sister bought 2 * 8 = 16 diaries. So she then had 16 + 8 = 24 diaries. Afterwards, she loses 1 / 4 * 24 = 6 diaries. So, Natalie's sister now has 24 - 6 = 18 diaries.
The answer: 18
Reverse engineering the question:
Natalie's sister had 8 small diaries in her locker. Last summer she bought double the number of diaries she had and then lost 1/4 of what she had. How many diaries does Natalie's sister have now?