[Question]Mrs. Petersons bought 10 tumblers for $45 each. She paid with five $100 bills. How much change will Mrs. Petersons receive?
[Answer]The 10 tumblers amount to $45 x 10 = $450. Mrs. Petersons paid $100 x 5 = $500. So, her change will be $500 - $450 = $50. The answer is 50.
Q: Central Park had 8 more than half of the number of trash cans as in Veteran's Park. Then one night, someone took half of the trash cans from Central Park and put them in Veteran's Park. If originally there were 24 trash cans in Veteran's Park, how many trash cans are now in Veteran's Park?
A: Half the original number of trash cans in Veteran's Park is 24 / 2 = 12 trash cans. Thus Central Park originally had 8 more than half the number of trash cans as what was originally in Veteran's Park, or 12 + 8 = 20 trash cans. Half of the trash cans from Central Park is 20 / 2 = 10 trash cans. After the addition of the 10 new cans, there are now 24 + 10 = 34 trash cans in Veteran's Park. The answer is 34.
Question: Kimberly loves gumballs and will trade almost anything she owns for them. A friend knows that Kim has a bunch of shiny new earrings that she loves. She agrees to give Kim 9 gumballs for each pair of earrings. On the first day, Kim brings her 3 pairs of earrings. On the second she brings her twice as many. On the third day, she brings 1 less than she brought on the second day. If Kim eats 3 gumballs a day, how many days will the gumballs last?
Answer: On day 2 Kim trades 6 earrings because 3 x 2 = 6. On day 3 Kim trades 5 earrings because 6 - 1 = 5. In total she trades 14 pairs of earrings because 3 + 6 + 5 = 14. She trades these for 126 gum - balls because 14 x 9 = 126. These last her 42 days because 126 / 3 = 42. The answer is 42.
[Question]A family just bought a newborn puppy that must eat a special type of dog food until it is 1 year old. The puppy needs to eat 2 ounces of this special dog food per day during the first 60 days of its life. After that, it needs to eat 4 ounces per day of the special food until it is old enough to eat regular dog food. If the special dog food is only sold in 5-pound bags, and there are 16 ounces in a pound, how many bags will the family need to buy to feed the puppy until it is old enough to eat regular dog food?
[Answer]The puppy will consume 60 * 2 = 120 ounces of the special dog food in the first 60 days. This leaves 365 - 60 = 305 days where the puppy will consume 4 ounces of food per day, or 305 * 4 = 1220 ounces of the special food. Thus, the puppy requires a total of 120 + 1220 = 1340 ounces of food before it is 1 year old. Each 5 - pound bag contains 5 * 16 = 80 ounces of special dog food. Therefore, the puppy will need to eat 1340 / 80 = 16.75 bags of the special dog food, meaning the family will need to buy 17 bags. The answer is 17.
Q: Cindy and Olaf made 15 candied apples which they will be selling for $2 each, and 12 candied grapes which they will be selling for $1.5. How much will they earn if they sell everything?
A: They will earn 15 x $2 = $30 for the candied apples. They will earn 12 x $1.5 = $18 for the candied grapes. Therefore, Cindy and Olaf will earn $30 + $18 = $48 if they sell everything. The answer is 48.
Question: There are 45 children in a classroom. One-third of them are girls. How many boys are in the classroom?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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One - third of all the kids are girls, which means 1 / 3 * 45 = 15 children. So there are 45 - 15 = 30 boys in the classroom. The answer is 30.