If Anna can read 1 page in 1 minute, then her speed is 1 / 1 = 1 page per min. If Carole can read at Anna's same speed then her speed is also 1 page per min. If Carole is only half the speed of Brianna, then that means Brianna is twice as fast as Carole, so 2 * 1 page per min = 2 pages per min. If a book is 100 pages long and Brianna can read 2 pages per minute, then it will take her 100 / 2 = 50 minutes to read the book.
The answer: 50
Reverse engineering the question: Anna can read 1 page in 1 minute. Carole can read as fast as Anna but at half the speed of Brianna. How long does it take Brianna to read a 100-page book?
Reasoning and answer: The 2 puppies cost 2 * 20 = 40 dollars. The stock is worth 100 dollars, meaning that the kittens cost 100 - 40 = 60 dollars. Since the cost of a kitten is 15 dollars, the pet shop has 60 / 15 = 4 kittens.
The answer: 4
What was the question?
Question: A pet shop has 2 puppies and some kittens. A puppy costs $20, and a kitten costs $15. If the stock is worth $100, how many kittens does the pet shop have?
There were 400 / 2 = 200 people in attendance. So that means each person paid 2000 / 200 = $10. So if 300 people attended they would have made 300 * 10 = $3000.
The answer: 3000
Reverse engineering the question: Tom attends a party that collects $2000. Half the school attended and the school had 400 people. How much would they have made if 300 people attended?
Reasoning and answer: Since Nathan writes 25 letters in an hour, Jacob writes 25 * 2 = 50 letters in an hour. Together, they write 50 + 25 = 75 letters in an hour,. In 10 hours, they'll write a total of 75 * 10 = 750 letters.
The answer: 750
What was the question?
Question: Jacob can write twice as fast as Nathan. Nathan wrote 25 letters in one hour. How many letters can the two write in 10 hours together?
From the baby spoons, Lisa holds 4 children * 3 spoons each = 12 baby spoons. Adding this to the decorative spoons means Lisa has 12 baby spoons + 2 decorative spoons = 14 old spoons. In the new set of cutlery, there is a total of 10 large spoons + 15 teaspoons = 25 new spoons. So in total, Lisa has 14 old spoons + 25 new spoons = 39 spoons.
The answer: 39
Reverse engineering the question: Lisa has decided to replace her old cutlery. As she is going through the cupboards, she sees the spoons from when each of her 4 children were babies as well as 2 decorative spoons she created. She doesn't want to get rid of any of these so she adds them to her new set of cutlery. The new set of cutlery has 10 large spoons and 15 teaspoons. If the children each had 3 spoons when they were babies, how many spoons does Lisa now have?
She needs twice as many lilies as the 3 snapdragons in the arrangement so she needs 2 * 3 = 6 lilies. She needs 8 roses, 12 daisies, 3 snapdragons and 6 lilies for a total of 8 + 12 + 3 + 6 = 29 flowers per arrangement. She needs 29 flowers per each of the 10 tables for a total of 29 * 10 = 290 flowers.
The answer: 290
Reverse engineering the question:
Marta is arranging floral centerpieces for a reception party. Each arrangement needs to have 8 roses,12 daisies, 3 snapdragons and twice as many lilies. The reception will have 10 tables. How many flowers will she need in total to fill this order?