[Question]There are 15 girls and 10 boys in Ms. Smith's class. She divided 375 books equally among them. How many books did all the girls get combined?
[Answer]There are 15 + 10 = 25 students in the class. 375 books were divided equally among them for a total of 375 / 25 = 15 books each. 15 girls will get a total of 15 * 15 = 225 books. The answer is 225.

[Question]Carol gets a fixed $20 allowance each week. She can also earn $1.5 more dollars each week if she does extra chores. At the end of 10 weeks, she has 425 dollars. How many extra chores did she average each week?
[Answer]She earned $42.5 on average per week because 425 / 10 = 42.5. She earned $22.5 each week from extra chores because 42.5 - 20 = 22.5. She did 15 extra chores a week because 22.5 / 1.5 = 15. The answer is 15.

[Question]Lisa is a member of the photography club at school. Every weekend the club will go anywhere to take photos. Leslie took 10 photos of animals to share with the club. She also took 3 times as many photos of flowers as animals and took 10 fewer scenery than the flowers. If Lisa took 15 fewer photos last weekend, How many photos did she take then?
[Answer]Lisa took 10 x 3 = 30 photos of flowers. She took 30 - 10 = 20 photos of the scenery. So, Lisa took 10 + 30 + 20 = 60 photos this week. Therefore, Lisa took 60 - 15 = 45 photos last weekend. The answer is 45.

[Question]Maria wants to buy a brand new bike. The retail price at the bike shop stands at $600. She saved $120 toward the purchase. As this was not enough, she asked her mother to give her the remaining amount. Her mother offered her $250 and told her that she needs to earn the rest working during the holidays. How much money must Maria earn to be able to buy the bike she wants?
[Answer]
Maria has $120 and received $250 from her mother. So she has 120 + 250 = $370. As the price of the bike stands at $600, Maria needs 600 370 = $230 more to buy the bike. The answer is 230.