[Question]Jack and Jill are friends who borrow from each other often. Last week Jack borrowed $1200 from Jill, which he promised to pay back with an interest of 10%. How much will Jack pay back?
[Answer]The interest on the loan is 0.1 * 1200 = $120. The total amount Jack needs to pay back is 1200 + 120 = 1320. The answer is 1320.
Q: Rachel is an artist. She posts a speed painting video each week on her Instagram account to promote her work. To save time, she paints and records 4 videos at a time. It takes her about 1 hour to set up her painting supplies and her camera. Then she records herself painting for 1 hour per painting. She takes another 1 hour to clean up. Each video takes 1.5 hours to edit and post. How long does it take Rachel to produce a speed painting video?
A: Rachel spends 1 + 1 = 2 hours setting up and cleaning up. She paints for 1 hour x 4 paintings = 4 hours. Then she edits 1.5 hours x 4 videos = 6 hours. She spends 2 + 4 + 6 = 12 hours to make 4 videos. So Rachel spends 12 / 4 = 3 hours on each video. The answer is 3.
Question: The local aquarium has 4 dolphins that each require 3 hours of training daily. The aquarium has 2 trainers and they want to split the hours they spend training the dolphins equally. How many hours will each trainer spend training the dolphins?
Answer: Training all the dolphins takes 4 * 3 = 12 hours. They want to split the hours equally so each trainer has to train the dolphins for 12 / 2 = 6 hours. The answer is 6.
[Question]Haman’s father has an egg business supplying the local market. On a Wednesday morning, his father sends him to go and collect 10 trays of eggs for sale from their store. While loading the eggs into the car, he accidentally drops two trays. He calls his father telling him this, and is told to add 7 more trays for sale. How many eggs were sold that day?
[Answer]When Haman collected 10 trays and dropped 2 trays, he was left with 10 trays - 2 trays = 8 trays. When he added 7 more trays, the total number of trays became 8 trays + 7 trays = 15 trays. Since each tray contains 36 eggs, the total number of eggs to be sold is 36 eggs / tray * 15 trays = 540 eggs. The answer is 540.
Q: Kohen has a business selling apples. Once a week, he orders 10 boxes of apples to add to his stock. If each box has 300 apples and he sells 3/4 of his stock in a certain week, what total number of apples is not sold?
A: In a week, he orders 10 * 300 = 3000 apples. When 3 / 4 of the stock is sold, the total amount of apples sold becomes 3 / 4 * 3000 = 2250 apples. The amount of apples remaining is 3000 - 2250 = 750 apples. The answer is 750.
Question: John decides to install a ramp in his house. He needs to get permits which cost $250. After that, he hires a contractor which costs $150 an hour and the guy works for 3 days at 5 hours per day. He also pays an inspector 80% less to make sure it is OK. How much was the total cost?
Answer:
The contractor works for 3 * 5 = 15 hours. That means he charged 150 * 15 = $2250. The inspector charged 2250 * .8 = $1800 less. So the inspector charged 2250 - 1800 = $450. So the total amount charged was 250 + 450 + 2250 = $2950. The answer is 2950.