Reasoning and answer: There are twice as many penguins as giraffes, so there are 5 * 2 = 10 penguins. The penguins make up 20% of all animals, so there are 100 / 20 * 10 = 50 animals in the whole Zoo. 4% of animals are elephants, so there are 4 / 100 * 50 = 2 elephants at the Zoo.
The answer: 2
What was the question?
Question: In a Zoo, there are different animals. There are 5 giraffes and twice as many penguins. Penguins make up 20% of all the animals in the Zoo. How many elephants are there in the Zoo if they make up 4% of all the animals?


The zoo has 8 x 3 = 24 snakes. It has 24 x 2 = 48 monkeys. The number of parrots and snakes added up is 8 + 24 = 32. There are 32 / 2 = 16 elephants. There are 16 - 3 = 13 zebras. The difference between zebras and monkeys is 48 - 13 = 35.
The answer: 35
Reverse engineering the question: A zoo has 8 parrots. It 3 times the number of snakes than parrots and 2 times the number of monkeys than snakes. The number of elephants is half the number of parrots and snakes added up, and there are 3 fewer zebras than elephants. What is the difference in number between the zebras and the monkeys?


Reasoning and answer: Toby has 60 friends because 33 / .55 = 60. 45% of his friends are girls because 100 - 55 = 45. He has 27 friends who are girls because 60 x .45 = 27.
The answer: 27
What was the question?
Question: 55% of Toby's friends are boys and the rest are girls. If he has 33 friends who are boys, how many friends does he have who are girls?


If it took Hadassah six hours to paint 12 paintings, then she paints 12 / 6 = 2 paintings in an hour. If two paintings take an hour to complete, 20 paintings will take 20 / 2 = 10 hours. The total time she took to finish all the paintings is 10 + 6 = 16 hours.
The answer: 16
Reverse engineering the question: Hadassah took six hours to paint 12 paintings. What would be the total time she's taken to finish all the paintings if she paints 20 more paintings?


Reasoning and answer: Bailey got 8 + 2 = 10 dog supplies. After adding the rawhide bones, she had 10 + 10 = 20 dog supplies. She needed to split the charges across 4 cards, so each charge had 20 * .25 = 5 items.
The answer: 5
What was the question?
Question: Bailey bought 8 dog treats and an additional 2 chew toys. She also got 10 more rawhide bones. Sadly, she forgot her money and had to split the charges equally across 4 credit cards. How many items were included in each charge?


Reasoning and answer: He knows 800 * .2 = 160 words. So he needs to learn 800 - 160 = 640 words. That means he needs to learn 640 / 40 = 16 words per day.
The answer: 16
What was the question?
Question:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Bo is learning words for the GRE. He got 800 flashcards. He knew 20% of the words on them. He has 40 days to learn the rest. How many words does he need to learn a day?