Q: If Katherine has 4 apples and 3 times as many pears in her fridge, how many bananas does she have if she has a total of 21 pieces of fruit?
A: Katherine has a total of 3 * 4 apples = 12 pears. She therefore had 4 apples + 12 pears = 16 apples and pears. We know she has 21 total pieces of fruit, so this means she must have 21 total - 16 = 5 bananas. The answer is 5.
Question: Every day, Billie bakes 3 pumpkin pies for 11 days and puts them in the refrigerator. It takes 2 cans of whipped cream to cover 1 pie. If Tiffany comes over and eats 4 pies, how many cans of whipped cream does Billie need to buy to cover the remaining pies?
Answer: In total Billie bakes 3 x 11 = 33 pies. After Tiffany eats the pies, this many pies are in the refrigerator: 33 - 4 = 29 pies. She needs to buy this many cans of whipped cream 29 x 2 = 58 cans. The answer is 58.
[Question]In one of the teacher's meetings, it was agreed that each class will contribute $90 for a school activity. The class of Miss Evans has $14 class funds and they decided to use it to lessen the contribution of each student. If the remaining amount will be divided among 19 students, how much will each student contribute?
[Answer]The 19 students will divide equally the remaining $90 - $14 = $76. So, each student will contribute $76 / 19 students = $4 / student. The answer is 4.
Q: Tom buys 20 shares of a stock that costs $3 each. He sells 10 of those shares for $4 each. The rest of the shares end up doubling in value. How much profit does he make?
A: He spends 3 * 20 = $60 on the shares. He sells 10 for 10 * 4 = $40. He sells the other 20 - 10 = 10 for a higher valuation. Their price was 3 * 2 = $6. So he got 10 * 6 = $60 from those. So in total, he got 60 + 40 = $100. So his profit was 100 - 60 = $40. The answer is 40.
Question: After 100 new people move into a town, 400 of the original population move out. Every year afterward, the town’s population is halved. After 4 years, the population is 60 people. Before the new people moved in, how many people lived in the town?
Answer: If the population is halving then at the end of the third year, the population must have been 60 people in the fourth year * 2 = 120 people. In the second year, the population was 120 people in the third year * 2 = 240 people. And in the first year, the population was 240 people in the third year * 2 = 480 people. Additional people moved out in the first year, so accounting for these shows the population was 480 people + 400 people who moved out = 880 people. Then removing the new people shows there were originally 880 people – 100 new people = 780 people. The answer is 780.
Q: Carson is sorting seaweed for various uses. 50% of the seaweed is only good for starting fires. 25% of what's left can be eaten by humans, and the rest is fed to livestock. If Carson harvests 400 pounds of seaweed, how many pounds are fed to livestock?
A:
First find what percent of the seaweed can be used for something besides starting fires: 400 pounds / 2 = 200 pounds. Then divide that amount by 4 to find the amount that's eaten by humans: 200 pounds / 4 = 50 pounds. Then subtract that amount from the 200 pounds to find how much is eaten by livestock: 200 pounds - 50 pounds = 150 pounds. The answer is 150.