[Question]Xander read 20% of his 500-page book in one hour. The next night he read another 20% of the book. On the third night, he read 30% of his book. How many pages does he have left to read?
[Answer]The first night he read 20% of his 500 - page book so he read .20 * 500 = 100 pages. The book is 500 pages and he read 100 so that leaves 500 - 100 = 400 pages. The second night he reads 20% of the 500 pages so he read .20 * 500 = 100 pages. The book is now 400 pages and he read 100 so that leaves 400 - 100 = 300 pages. The third night he read 30% of the book so he read .30 * 500 = 150 pages. The book is now 300 pages and he read 150 pages so he has 300 - 150 = 150 pages left to read. The answer is 150.

[Question]Nathan bought one large box of bananas. He saw that there are six bunches with eight bananas in a bunch and five bunches with seven bananas in a bunch. How many bananas did Nathan have?
[Answer]There were 6 x 8 = 48 bananas from the bunches with 8 bananas in a bunch. There were 5 x 7 = 35 bananas from the bunches with 7 bananas in a bunch. Therefore, Nathan had 48 + 35 = 83 bananas. The answer is 83.

[Question]Chenny has 10 pieces of candies to be given out to her friends. She realized that she needs to buy 4 more so each of her friends will receive 2 candies. How many friends does Chenny have?
[Answer]Chenny has a total of 10 + 4 = 14 candies. If each friend will receive 2 candies each, then she has 14 / 2 = 7 friends. The answer is 7.

[Question]It costs $.10 to print one page. Jenny wants to print 7 copies of her 25-page essay. She also wants to buy 7 pens that each cost $1.50. If she pays the store with 2 twenty dollar bills, how much money should she get in change?
[Answer]
Jenny needs to print 7 * 25 = 175 pages. This will cost 175 * $.10 = $17.5. The pens will cost 7 * $1.50 = $10.50. In total, she will spend $17.5 + $10.5 = $28. Since she pays with 2 twenty dollar bills she pays with 2 * 20 = 40 dollars. Thus, she will get $40 - $28 = $12 in change. The answer is 12.