Question: After buying shirts worth $27 from a store, Dennis received 2 $10 bills and $3 in loose coins for his change. How much money did Dennis have initially?
Answer: Dennis received $10 x 2 = $20. So, he received a total of $20 + $3 = $23 change. Therefore, Dennis initially had $27 + $23 = $50. The answer is 50.
[Question]Beth is a scuba diver. She is excavating a sunken ship off the coast of a small Caribbean island and she must remain underwater for long periods. Her primary tank, which she wears when she first enters the water, has enough oxygen to allow her to stay underwater for 2 hours. She also has several 1-hour supplemental tanks that she takes with her as well as stores on the ocean floor so she can change tanks underwater without having to come up to the surface. She will need to be underwater for 8 hours. How many supplemental tanks will she need?
[Answer]For an 8 - hour dive, she will use her 2 - hour primary tanks and will need supplemental tanks for 8 - 2 = 6 additional hours. Since each supplemental tank holds 1 hour of oxygen, for 6 hours she will need 6 / 1 = 6 supplemental tanks. The answer is 6.
Q: Ali had a stock of 800 books in his Room. He sold 60 on Monday, 10 on Tuesday, 20 on Wednesday, 44 on Thursday and 66 on Friday. How many books were not sold?
A: We look first for the total number of books that were sold: 60 + 10 + 20 + 44 + 66 = 200 books. So the total number of books that were not sold is: 800 – 200 = 600 books. The answer is 600.
Question: Bernie loves eating chocolate. He buys two chocolates every week at the local store. One chocolate costs him $3. In a different store, there is a long-term promotion, during which each chocolate costs only $2. How much would Bernie save in three weeks, if he would buy his chocolates in this store instead of his local one?
Answer: During three weeks, Bernie buys 3 * 2 = 6 chocolates. In the local store, he pays for them 6 * 3 = $18. If Bernie would buy the same chocolates in the different store, he would pay 6 * 2 = $12. So Bernie would be able to save 18 - 12 = $6. The answer is 6.
[Question]A local park has 70 pigeons that call the park home. Half of the pigeons are black, and 20 percent of the black pigeons are male. How many more black female pigeons are there than black male pigeons?
[Answer]Black:70 / 2 = 35 pigeons. Black Male: 35(.20) = 7 pigeons. 35 - 7 = 28 female black pigeon. There are 28 - 7 = 21 more black female pigeons. The answer is 21.
[Question]Candice read 3 times as many books as Amanda in their school's Book Tournament. Kara read half the number of books that Amanda read, and Patricia read 7 times the number of books that Kara read. If Candice read 18 books, how many books did Patricia read?
[Answer]
Amanda read 18 / 3 = 6 books. Kara read 6 / 2 = 3 books. Patricia read 7 x 3 = 21 books. The answer is 21.