Q: Kurt's old refrigerator cost $0.85 a day in electricity. He recently bought a new energy-efficient refrigerator that only cost $0.45 a day in electricity. How much money does Kurt save in a 30-day month with his new refrigerator?
A: The old refrigerator costs $0.85 a day so for 30 days it costs .85 * 30 = $25.50. The new refrigerator costs $0.45 a day so for 30 days it costs .45 * 30 = $13.50. Over 30 days, Kurt saves 25.50 - 13.50 = $12.00 a month with his new refrigerator. The answer is 12.
Question: There are three goldfish and ten platyfish in a fish tank. Each goldfish plays with ten red balls, while each platyfish plays with five white balls. What is the total number of balls in the fish tank?
Answer: If there are 3 goldfish, and each is playing with ten red balls, then the number of red balls in the tank is 3 * 10 = 30. There are also ten platyfish playing with 5 white balls, there are 10 * 5 = 50 white balls. The total number of red and white balls in the fish tank is 50 + 30 = 80. The answer is 80.
[Question]Michael has two brothers. His oldest brother is 1 year older than twice Michael's age when Michael was a year younger. His younger brother is 5 years old, which is a third of the age of the older brother. What is their combined age?
[Answer]The oldest brother is 15 because 3 x 5 = 15. Michael is 8 because if 1 + (Michael's age - 1) x 2 = 15 then Michael's age = 8. Their combined age is 28 because 5 + 15 + 8 = 28. The answer is 28.
Q: An electronic shop offers smartphones for $300 each, personal computers for $500 more than smartphones, and advanced tablets for the sum of the prices of a smartphone and personal computer. How much do you have to pay to buy one of each of the three mentioned products?
A: The price of a personal computer is $300 + $500 = $800. The price of an advanced tablet would be $300 + $800 = $1100. To buy each of these products, you would have to pay $300 + $800 + $1100 = $2200. The answer is 2200.
Question: Bucky earns money each weekend catching and selling fish. He wants to save up for a new video game, which costs $60. Last weekend he earned $35. He can earn $5 from trout and $4 from blue-gill. He caught five fish this Sunday. If 60% were trout, and the rest were blue-gill, how much more does he need to save before he can buy the game?
Answer: He is $25 short for the game because 60 - 35 = 25. He caught 3 trout because 5 x .6 = 3. He caught 2 blue - gill because 5 - 3 = 2. He earned $15 from the trout because 3 x 5 = 15. He earned $8 from the blue - gill because 2 x 4 = 8. He earned $23 total because 15 + 8 = 23. He is $2 short because 25 - 23 = 2. The answer is 2.
Q: Tara has been planning to buy a laptop which costs $1000. A computer shop accepts payment in installments of $65 per month provided that a 20% down payment is made. If Tara wants to pay an additional $20 for the down payment, how much will her balance be after paying for 4 months?
A:
Tara has to make a $1000 x 20 / 100 = $200 down payment. Since Tara wants to pay $20 more for the down payment, her total down payment will be $200 + $20 = $220. So her remaining balance payable over a year is $1000 - $220 = $780. Tara has to make a monthly payment of $780 / year / 12 months / year = $65 / month. The total cost of her payments for 4 months is $65 / month x 4 months = $260. Therefore, Tara's balance after 4 months is $780 - $260 = $520. The answer is 520.