Question: A 220-liter barrel has a small leak. It lost 10% of its contents before anyone noticed. How many liters are left in the barrel?
Answer: The barrel lost 220 * 10 / 100 = 22 liters before anyone noticed. So, 220 22 = 198 liters are left in the barrel. The answer is 198.
[Question]Maryann can pick the lock on a cheap pair of handcuffs in 6 minutes and on an expensive pair of handcuffs in 8 minutes. If Maryann needs to rescue three of her friends who have expensive handcuffs on their hands and cheap handcuffs on their ankles, how long will it take for her to free all of them?
[Answer]First find the total time it takes Maryann to rescue one friend: 6 minutes + 8 minutes = 14 minutes. Then multiply the time to save one friend by the number of friends Maryann needs to save: 14 minutes / friend * 3 friends = 42 minutes. The answer is 42.
Q: Andy is checking to see if all the cars in the parking lot paid for their parking. 75% of the cars have valid tickets, and 1/5th that number have permanent parking passes. If there are 300 cars in the parking lot, how many people tried to park in the lot without paying?
A: First find how many cars have valid tickets: 75% * 300 cars = 225 cars. Then find the percentage of cars with parking passes: 75% / 5 = 15%. Then multiply that number by the total number of cars to find the number with parking passes: 15% * 300 cars = 45 cars. Then subtract all the cars with valid forms of parking to find the number parked illegally: 300 cars - 225 cars - 45 cars = 30 cars. The answer is 30.
Question: Vins rides his bike 6 miles to school. He rides home a different route that is 7 miles long. This week, Vins rode to school and back 5 times. How many miles did Vins ride his bike this week?
Answer: He rides his bike 6 + 7 = 13 miles to school and back every day. Therefore, Vins rode his bike 13 x 5 = 65 miles to school and back this week. The answer is 65.
[Question]In the spelling bee, Max has 5 points, Dulce has 3 points, and Val has twice the combined points of Max and Dulce. If they are on the same team and their opponents' team has a total of 40 points, how many points are their team behind?
[Answer]Max and Dulce's total combined points are 5 + 3 = 8. So, Val got 8 x 2 = 16 points. And the total points of their team is 8 + 16 = 24. Therefore, their team is 40 - 24 = 16 points behind. The answer is 16.
[Question]The Rotary Club is holding its annual fundraising Omelet Breakfast, with tickets sold in advance. The tickets come in different price levels, for young children, older children, adults, and seniors. This year they sold 53 small children tickets, 35 older children tickets, 75 adult tickets, and 37 senior tickets. To figure out how many eggs they need to buy, the club estimates that small children can eat a half omelet, older children can eat a whole omelet, adults will eat two omelets, and seniors will eat one and a half omelets. Just to be on the safe side, they get enough eggs to make 25 extra omelets. If they use 2 eggs for each omelet, how many eggs will they need to buy?
[Answer]
They'll need to make an estimated 0.5 * 53 = 26.5 omelets for small children. They'll need to make an estimated 1 * 35 = 35 omelets for older children. They'll need to make an estimated 2 * 75 = 150 omelets for the adults. And they'll need to make an estimated 1.5 * 37 = 55.5 omelets for the seniors. Along with the 25 extra omelets they'll make as a buffer, they will need enough eggs for 26.5 + 35 + 150 + 55.5 + 25 = 292 omelets. So they will need 2 * 292 = 584 eggs. The answer is 584.