Question: Rihanna has $50 to go to the supermarket. Rihanna bought 6 mangoes and 6 cartons of apple juice. Each mango cost $3 and each carton of apple juice cost $3. How much money does Rihanna have left?
Answer: The cost of the mangoes is 6 mangoes × $3 / mango = $18. The cost of the apple juice is 6 cartons × $3 / carton = $18. Find the total cost of the groceries which is $18 + $18 = $36. Rihanna has $50 − $36 = $14 left. The answer is 14.

Question: At the height of cranberry season, there are 60000 cranberries in a bog. 40% are harvested by humans and another 20000 are eaten by elk. How many cranberries are left?
Answer: First find the total number of cranberries harvested by humans: 60000 cranberries * 40% = 24000. Then subtract the number of cranberries taken by the humans and elk to find the number remaining: 60000 cranberries - 24000 cranberries - 20000 cranberries = 16000 cranberries. The answer is 16000.

Question: Maryann spends seven times as long doing accounting as calling clients. If she worked 560 minutes today, how many minutes did she spend calling clients?
Answer: Let a be the amount of time Maryann spends doing accounting and c be the amount of time she spends calling clients: We know that a + c = 560 and a = 7c. Substituting the second equation into the first equation, we get 7c + c = 560. Combining like terms, we get 8c = 560. Dividing both sides by 8, we get c = 70. The answer is 70.

Question: Henrietta is repainting her house. The walls in the living room take up 600 square feet. She has three bedrooms. The walls in each bedroom take up 400 square feet. If one gallon of paint can cover 600 square feet, how many gallons of paint does Henrietta need to paint her house?
Answer:
The total square footage from the three bedrooms is 3 * 400 = 1200 square feet. The total square footage of the house is 1200 + 600 = 1800 square feet. Henrietta needs 1800 / 600 = 3 gallons of paint. The answer is 3.