First find the total number of stars she saw in the west: 120 stars * 6 = 720 stars. Then add the number she saw in the east to find the total number: 720 stars + 120 stars = 840 stars.
The answer: 840
Reverse engineering the question: Tilly counts 120 stars to the east of her house and six times that number to the west. How many stars does she count total?

Each tree A gives her six good oranges a month 10 x .6 = 6. Each tree B gives her five good oranges a month because 15 x (1 / 3) = 5. On average, a tree gives her 5.5 oranges a month because .5(6) + .5(5) = 5.5. She has ten total trees because 55 / 5.5 = 10.
The answer: 10
Reverse engineering the question: Salaria is growing oranges this summer. She bought two types of trees. She has 50% of tree A and 50% of tree B. Tree A gives her 10 oranges a month and 60% are good. Tree B gives her 15 oranges and 1/3 are good. If she gets 55 good oranges per month, how many total trees does she have?

The total number of calories he gets per day is 20 x 3 = 60. Therefore the total number of calories he will get after 2 days is 60 x 2 = 120.
The answer: 120
Reverse engineering the question: Dimitri eats 3 burgers per day. Each burger has a total of 20 calories. How many calories will he get after two days?

He gets 3 * $400 = $1200 per month. So he gets 1200 * 12 = $14,400 per year. So he pays 12 * 900 = $10800 a year. That means his profit is 14400 - 10800 = $3600 per year.
The answer: 3600
Reverse engineering the question:
John sublets his apartment to 3 people who each pay $400 per month. He rents the apartment for $900 a month. How much profit does he make in a year?