Come up with a question and reasoning that would justify this answer: 3400
Question and rationale: The question is: About 450 000 people lived in Maryville in 2000. In 2005, about 467 000 people lived in Maryville. What is the average number of people added each year?
Step-by-step reasoning process: The total increase of people was counted in 2005 - 2000 = 5 years. In 5 years, there is a total of 467 000 - 450 000 = 17 000 people increase. So, each year, the average number of people added is 17 000 / 5 = 3 400.

Come up with a question and reasoning that would justify this answer: 4
Question and rationale: The question is: Julie, Letitia and Anton decided to have dinner together at a nearby restaurant. Julie orders $10 worth of food, Letitia orders $20 worth of food, and Anton orders $30 worth of food. How much should each pay in tips if they want to split a 20% tip for the whole meal evenly?
Step-by-step reasoning process: First, we need to determine how much the entire meal costs before we can determine the tip. We perform 10 + 20 + 30 = 60 dollars worth of food. Now we need to find out how much the total tip to be paid is, by multiplying 60 * .2 = 12 dollars in tips. Since they want to split this evenly amongst three people, this works out to 12 / 3 = 4 dollars in tips per person.

Come up with a question and reasoning that would justify this answer: 10
Question and rationale: The question is: Laura bought 2 pairs of pants for $54 each and 4 shirts for $33 each. She gave $250 to the cashier. So how much change did she take?
Step-by-step reasoning process: 54 * 2 = $108 is the price of 2 pairs of pants. 4 * 33 = $132 is the price of 4 shirts. 108 + 132 = $240 is the total price. So the cashier gave 250 - 240 = $10 change to Laura.

Come up with a question and reasoning that would justify this answer: 45
Question and rationale:
The question is: Lenny bought 20 boxes of pens. Each box contained 5 pens. She gave 40% of the pens to her close friends and one-fourth of what's left to her classmates. How many pens were left for Lenny?
Step-by-step reasoning process: Lenny has 20 x 5 = 100 pens. She gave her close friends 100 x 40% = 40 pens. So, 100 - 40 = 60 pens were left. Half of 60 is 60 / 4 = 15 pens. Thus, Lenny has 60 - 15 = 45 pens left.