[Question]There was only enough room for 21 people on a raft if no one wore life jackets. There were 7 fewer people who could fit on the raft if everyone wore life jackets. If 8 people on the raft needed life jackets, how many people could fit on the raft?
[Answer]If everyone wore life jackets, only 21 - 7 = 14 people could fit on the raft. For every person less on the raft, 14 / 7 = 2 life jackets could fit. For 8 life jackets, 8 / 2 = 4 less people could fit. 21 - 4 = 17 people could fit on the raft. The answer is 17.
Q: John goes to the store and pays with a 20 dollar bill. He buys 3 sodas and gets $14 in change. How much did each soda cost?
A: He paid 20 - 14 = $6. So each soda cost 6 / 3 = $2. The answer is 2.
Question: Tree Elementary School is raising money for a new playground. Mrs. Johnson’s class raised $2300, which is twice the amount that Mrs. Sutton’s class raised. Mrs. Sutton’s class raised 8 times less than Miss Rollin’s class. Miss Rollin’s class raised a third of the total amount raised by the school. How much money did the school raise for the playground if 2% will be deducted for administration fees?
Answer: Find the amount Mrs. Sutton’s class raised by dividing $2300 by 2. $2300 / 2 = $1150. Find the amount Miss Rollin’s class raised by multiplying $1150 by 8. $1150 x 8 = $9200. Multiply $9200 by 3 to find the total amount raised. $9200 x 3 = $27600. Convert 2% to decimal. 2 / 100 = 0.02. Multiply $27600 by 0.02 to find the administration fees. $27600 x 0.02 = $552. Subtract the administration fee from the total amount raised. $27600 - $552 = $27048. The answer is 27048.
[Question]Jill runs a business breeding llamas. Nine of her llamas got pregnant with 1 calf, and 5 of them got pregnant with twins. After they give birth, Jill traded 8 of the calves for 2 new adult llamas. Then she sells 1/3 of her herd at the market. How many total llamas (calves and adults) does Jill have now?
[Answer]The number of calves that will be born as twins is 5 * 2 = 10 calves. The total number of adults and calves before the trade is 9 + 5 + 9 + 10 = 33. Jill had 33 - 8 = 25 left for trading 8 of the claves. But, she got 2 adult llamas in return, so she now has a total of 25 + 2 = 27 llamas. She then sold 27 / 3 = 9 llamas in the market. So, Jill has 27 - 9 = 18 llamas now. The answer is 18.
Q: Peter is buying a set of glasses. They cost $3 for small glasses and $5 for large ones. He has $50. If he buys 8 small ones and leaves with $1 in change, how many large ones did he buy?
A: He spent $49 on glasses because 50 - 49 = 1. He spent $24 on small glasses because 8x3 = 24. He spent $25 on large glasses because 49 - 24 = 25. He bought 5 large glasses because 25 / 5 = 5. The answer is 5.
Question: A store decides to shut down and sell all of its inventory. They have 2000 different items which would normally retail for $50. They are offering an 80% discount and manage to sell 90% of the items. They owed $15000 to their creditors. How much money do they have left after the sale?
Answer:
They sold 2000 * .9 = 1800 items. They offered a 50 * .8 = $40 discount. That means that each item sold for 50 - 40 = $10. So they made 1800 * 10 = $18,000. So they had 18,000 - 15,000 = $3,000 leftover. The answer is 3000.