Step-by-step reasoning process: A sixth of the books is 9900 / 6 = 1650 books. Only 4 * 1650 = 6600 books are left. The library sold 9900 - 6600 = 3300 books over the summer.
[Q & A] The question is The library has 9,900 books. Over the summer, they sold some books. If only four sixths of the books are left, how many did they sell?
The answer is 3300

Step-by-step reasoning process: There are 14 boys - 4 boys = 10 boys left. There are 10 girls - 3 girls = 7 girls left. In total there are 10 boys + 7 girls = 17 boys and girls left.
[Q & A] The question is The school has 14 boys and 10 girls. If 4 boys and 3 girls drop out, how many boys and girls are left?
The answer is 17

Step-by-step reasoning process: Benjamin walks 6 miles to work and 6 miles home, so he walks 6 * 2 = 12 miles to work and home. He walks to work 5 days a week, so he walks 12 * 5 = 60 miles to work and home a week. He walks his dog 2 times a day for 2 miles, so he walks 2 * 2 = 4 miles a day for his dog. He walks his dog 7 days a week, so he walks 4 * 7 = 28 miles for his dog. He walks 3 miles to the store 2 times a week, so he walks 2 * 3 = 6 miles to the store each week. Adding his weekly 1 mile to his friend's house, Benjamin walks 60 + 28 + 6 + 1 = 95 miles in a week.
[Q & A] The question is Benjamin is tracking how many miles he walks in a week. He walks to work and home five days a week, walks his dog twice a day every day, walks to his best friend's house once a week, and walks to the convenience store twice a week. Work is six miles away, dog walks are two miles, his best friend's house is one mile, and the convenience store is three miles. How many miles does Benjamin walk in a week?
The answer is 95

Step-by-step reasoning process: Combining Hermione and Luna has 14 + 17 = 31 spelling badges. Removing their spelling badges from the total, Celestia has 83 - 31 = 52 spelling badges.
[Q & A]
The question is Hermione, Luna, and Celestia combined have 83 spelling badges. If Hermione has 14 and Luna has 17, how many spelling badges does Celestia have?
The answer is 52