Step-by-step reasoning process: The first 3 shirts cost 15 * 3 = 45 dollars in total. There are 5 - 3 = 2 shirts remaining. The remaining 2 shirts cost 85 - 45 = 40 dollars in total. One of the remaining shirts costs 40 / 2 = 20 dollars.
The question and answer:
Question and answer: Five shirts together cost $85. Of the 5 shirts, there are 3 shirts that cost $15 each. If the remaining shirts are each equal in value, what is the cost, in dollars, of one of the remaining shirts?
The answer is 20

Step-by-step reasoning process: There are 2 / 3 green crayons * 6 blue crayons = 4 green crayons. The pink crayons left in the box are 24 crayons total - 8 red - 6 blue - 4 green = 6 pink crayons.
The question and answer:
Question and answer: A crayon box has 24 crayons total. 8 crayons are red, 6 crayons are blue, there are 2/3 the number of green crayons as blue crayons, and the rest of the crayons are pink. How many crayons are pink?
The answer is 6

Step-by-step reasoning process: We can find how long the hare spends running by dividing the distance of the race by the hare's speed: 20 feet / 10 feet / second = 2 seconds. We can do the same for the turtle: 20 feet / 1 foot / second = 20 seconds. Finally, subtract the hare's run time from the turtle's run time to find the length of the head start the turtle needs: 20 seconds - 2 seconds = 18 seconds.
The question and answer:
Question and answer:
Mark has two pets, a hare that runs 10 feet/second and a turtle that crawls 1 foot/second. If they're going to run a 20 foot-race, how much of a head start (in seconds) does the turtle need to finish in a tie?
The answer is 18