Question: There are 250 books inside a library. On Tuesday, 120 books are taken out to be read by children. On Wednesday, 35 books are returned. On Thursday, another 15 books are withdrawn from the library. How many books are now in the library?
Answer: Step-by-step reasoning process: On Tuesday, 120 books were taken out 250 - 120 = 130 books. On Wednesday, 35 books were returned 130 + 35 = 165 books. On Thursday, 15 books were borrowed 165 - 15 = 150 books.
So the answer is 150.

Question: A fixer uses 30% of the nails in a container to repair the kitchen. He also used 70% of the remaining nails in the container to repair the fence. If there were 400 nails in the container, how many nails are remaining?
Answer: Step-by-step reasoning process: The fixer used 30 / 100 * 400 = 120 nails to fix the kitchen. The number of nails remaining in the container after he fixes the kitchen is 400 - 120 = 280. He also uses 70 / 100 * 280 = 196 of the nails remaining in the container to fix the fence. The total number of nails which the fixer hasn't used is 280 - 196 = 84.
So the answer is 84.

Question: Silvia’s bakery is offering 10% on advanced orders over $50.00. She orders 2 quiches for $15.00 each, 6 croissants at $3.00 each and 6 buttermilk biscuits for $2.00 each. How much will her order be with the discount?
Answer: Step-by-step reasoning process: She orders 2 quiches for $15.00 each so they cost 2 * 15 = $30.00. She orders 6 croissants at $3.00 each so they cost 6 * 2.5 = $18.00. She orders 6 biscuits at $2.00 each so they cost 6 * 2 = $12.00. Her advance order is 30 + 18 + 12 = $60.00. Her advance order is over $50.00 so she can get 10% off so .10 * 60 = $6.00. Her order is $60.00 and she gets $6.00 off so her advanced order will cost 60 - 6 = $54.00.
So the answer is 54.

Question: Carmen is counting the cars that pass by her window. All the cars are either white, black, or red. She sees 50 trucks and 40 cars. Half the trucks are red, and another 20% are black. If she picks one car at random, what is the percentage chance it's a white truck, rounded to the nearest integer?
Answer:
Step-by-step reasoning process: First find the total number of vehicles Carmen counted: 50 trucks + 40 cars = 90 vehicles. Then find the number of trucks that were red: 50 trucks / 2 = 25 trucks. Then find the number of trucks that were black: 50 trucks * .2 = 10 trucks. Then subtract the red and black trucks from the total number of trucks to find the number of white trucks: 50 trucks - 25 trucks - 10 trucks = 15 trucks. Then divide the number of white trucks by the number of vehicles and multiply by 100% to find the percentage of vehicles that are white trucks: 15 trucks / 90 vehicles * 100% = 16.66...%, which rounds up to 17%.
So the answer is 17.