Half of Bernie's collection means 18 * 0.5 = 9 postcards. So he was able to sell 9 postcards for 9 * 15 = $135. He decided to spend all of his money on new postcards for $5 each, so he was able to buy 135 / 5 = 27 new postcards. This means Bernie has 9 + 27 = 36 postcards after all.
The answer: 36
Reverse engineering the question: Bernie has a collection of 18 unique postcards. He decided to sell half his collection for $15 per postcard. After he has successfully sold his postcards he decided to spend all the earned money to buy new postcards for $5 each. How many postcards does Bernie have after all his transactions?


Reasoning and answer: She has 1 serving of honey per cup of tea and she has 2 teas at night so she needs a total of 1 * 2 = 2 servings per night. There are 6 servings in 1 ounce and she has a 16 - ounce jar of honey so that's 6 * 16 = 96 servings of honey. Her jar has 96 servings and she has 2 servings a night so 1 jar will last her 96 / 2 = 48 nights.
The answer: 48
What was the question?
Question: Tabitha adds 1 serving of honey per cup of tea in the evening. She usually has 2 cups of tea before bed. She buys her honey in a 16-ounce container. If there are 6 servings of honey per ounce, how many nights will she be able to enjoy honey in her tea before bed?


If there are 4 hearts on a card, a standard deck of 52 playing cards will have 208 hearts. There are twice as many cows in Devonshire as there are hearts on a standard deck of 52 playing cards, meaning there are 2 * 208 = 416 cows in Devonshire. The total cost of the cows when they are sold at $200 each is 416 * $200 = $83200.
The answer: 83200
Reverse engineering the question: There are twice as many cows in Devonshire as there are hearts on a standard deck of 52 playing cards. If there are 4 hearts on a card, calculate the total cost of the cows when they are sold at $200 each.


Reasoning and answer: At regular price, the polo shirts are 2 x $50 = $100. At 40% off, he gets a discount of , $100 x 40% = $40. With this discount, the polo shirts cost $100 - $40 = $60.
The answer: 60
What was the question?
Question: Zane purchases 2 polo shirts from the 40% off rack at the men’s store. The polo shirts are $50 each at the regular price. How much did he pay for the shirts?


Each box contains 4 tinsel + 1 tree + 5 snow globes = 10 decorations. A total of 11 family boxes + 1 community center box = 12 boxes have been given out. So the total number of decorations given out is 10 decorations * 12 boxes = 120 decorations.
The answer: 120
Reverse engineering the question: Free Christmas decorations are being given out to families. Each box of decorations contains 4 pieces of tinsel, 1 Christmas tree and 5 snow globes. If 11 families receive a box of decorations and another box is given to the community center, how many decorations have been handed out?


She uses 3 ounces of beans per day because 2 x 1.5 = 3. She uses 21 ounces of beans per week because 7 x 3 = 21. She buys 2 bags of beans per week because 21 / 10.5 = 2. She spends $16 on the beans per week because 2 x 8 = 16. She spends $2 on the milk per week because 4 x (1 / 2) = 2. She spends $18 per week on her coffee because 16 + 2 = 18.
The answer: 18
Reverse engineering the question:
Maddie wants to see how much her mom spends on coffee each week. She makes herself 2 cups of coffee per day. Each cup has 1.5 ounces of coffee beans. A bag of coffee costs $8 and contains 10.5 ounces of beans. She uses 1/2 a gallon of milk per week. A gallon of milk costs $4. She doesn't add any sugar to the coffee. How much does she spend on her coffee per week?