[Question]Hayden has a tank with a small hole in the bottom. The tank starts with 40 gallons of water. It loses 2 gallons of water per hour. Hayden does not add any water for the first two hours. He adds 1 gallon of water to the tank in hour three. He adds three gallons of water to the tank in the fourth hour. How much water is left in the tank at the end of the fourth hour?
[Answer]Over the four hours, the tank loses 2 * 4 = 8 gallons of water. Hayden adds a total of 1 + 3 = 4 gallons of water. At the end of the four hours, there is 40 - 8 + 4 = 36 gallons of water left in the tank. The answer is 36.
Q: On a 16 GB (gigabyte) capacity USB drive, 50% is already busy. Calculate the number of gigabytes still available.
A: We calculate 50% of 16 GB:. 50 / 100 * 16 GB = 0.5 * 16 GB = 8 GB. That leaves 16 GB - 8 GB = 8 GB available on this key. The answer is 8.
Question: Paul went to a shop to buy some groceries. He bought some bread for $2, butter for $3, and juice for two times the price of the bread. He had $15 for his shopping. How much money did Paul have left?
Answer: The price of the juice was 2 * 2 = $4. So in total he paid for his shopping 2 + 3 + 4 = $9. That means he had 15 - 9 = $6 left. The answer is 6.
[Question]Lucille is painting her room. Two of her walls are 3 meters wide and 2 meters tall. The third wall is 5 meters wide and 2 meters tall. The final wall is 4 meters wide and 2 meters tall. If each can of paint covers 2 square meters, how many cans of paint does Lucille need?
[Answer]For the first set of walls, each wall covers 3 meters wide * 2 meters tall = 6 square meters. There are two of these walls, so this becomes a total of 6 meters * 2 walls = 12 square meters. The third wall covers 5 meters wide * 2 meters tall = 10 square meters. The final wall covers 4 meters wide * 2 meters tall = 8 square meters. So in total, the paint needs to cover 12 + 10 + 8 = 30 metres. Since each can covers 2 meters, Lucille needs 30 meters / 2 = 15 cans of paint. The answer is 15.
Q: Susie and Britney each keep chickens, of two different breeds. Susie has 11 Rhode Island Reds and 6 Golden Comets. Britney has twice as many Rhode Island Reds as Susie, but only half as many Golden Comets. How many more chickens are in Britney's flock than in Susie's?
A: Britney has 11 * 2 = 22 Rhode Island Reds. She has 6 / 2 = 3 Golden Comets. She has 22 + 3 = 25 total. Susie has 11 + 6 = 17 total. Britney has 25 - 17 = 8 more. The answer is 8.
Question: A concert ticket costs $40. Mr. Benson bought 12 tickets and received a 5% discount for every ticket bought that exceeds 10. How much did Mr. Benson pay in all?
Answer:
Mr. Benson had a 5% discount for each of the 12 - 10 = 2 tickets. So, those two tickets had a $40 x 5 / 100 = $2 discount each. Hence, each ticket cost $40 - $2 = $38 each. Thus, two discounted tickets amount to $38 x 2 = $76. And the other ten tickets amount to $40 x 10 = $400. Hence, Mr. Benson paid a total of $400 + $76 = $476. The answer is 476.