Question: John goes to the bakery to buy rolls. They sell them for 5 dollars for a dozen. He spent 15 dollars. How many rolls did he get?
Answer: He got 15 / 5 = 3 dozen. So he bought 3 * 12 = 36 rolls. The answer is 36.
[Question]Kristin can run three times faster than Sarith. If Kristin runs 12 times around the adult football field and Sarith runs at the same time around the children's football field that is half the distance as the other field, how many laps did Sarith go around the children's football field?
[Answer]Sarith would run around the adult football field, 12 laps / 3 = 4 laps. So on the children's football field, she managed to run, 4 laps * 2 = 8 laps. The answer is 8.
Q: Melanie baked 10 batches of brownies, with 20 brownies in each batch. She set aside 3/4 of the brownies in each batch for a bake sale, put 3/5 of the remaining in a container, and gave out the rest. How many brownies are given out?
A: Melanie set aside 20 x 3 / 4 = 15 brownies from each batch for a bake sale. So, there are 20 - 15 = 5 brownies that are not for bake sale from each batch. Out of the 5, 5 x 3 / 5 = 3 brownies are kept in a container from each batch. Thus, 5 - 3 = 2 brownies are given out from each batch. Therefore, a total of 2 x 10 = 20 brownies are given out from the 10 batches. The answer is 20.
Question: Maria bought a ticket to a ZOO. The regular price stands at $15, but she was able to get a 40% discount. How much did Maria pay for the ticket?
Answer: The discount Maria got was 40 / 100 * 15 = $6. That means the price for her ticket was 15 - 6 = $9. The answer is 9.
[Question]A mosquito sucks 20 drops of blood every time it feeds on someone. If there are 5000 drops per liter and you have to lose 3 liters of blood to die, how many mosquitoes would have to feed on you to kill you?
[Answer]First find the total number of liters a mosquito sucks in one feeding: 20 drops / 5000 drops / liter = .004 L / feeding. Then divide the lethal amount of blood by the amount of blood one mosquito can drain: 3 L / .004 L / feeding = 750 feedings. The answer is 750.
[Question]Two days ago, Uncle Welly planted 50 roses on his vacant lot. Yesterday, he planted 20 more roses than the previous day. Today, he planted twice the number of roses than two days ago. How many roses did Uncle Welly plant in his vacant lot?
[Answer]
Yesterday, Uncle Welly was able to plant 50 + 20 = 70 roses. Today, he planted 2 x 50 = 100 roses. Therefore, Uncle Welly has 50 + 70 + 100 = 220 roses planted on his vacant lot. The answer is 220.