Step-by-step reasoning process: First find the total number of tomatoes harvested: 18 plants * 7 tomatoes / plant = 126 tomatoes. Then divide that number by 2 to find how many tomatoes are left undried: 126 tomatoes / 2 = 63 tomatoes. Then divide that number by 3 to find how many tomatoes are turned into sauce: 63 tomatoes / 3 = 21 tomatoes. Then subtract that number from the number of undried tomatoes to find the remaining number of tomatoes: 63 tomatoes - 21 tomatoes = 42 tomatoes.
The question and answer:
Question and answer: Andy harvests all the tomatoes from 18 plants that have 7 tomatoes each. If he dries half the tomatoes and turns a third of the remainder into marinara sauce, how many tomatoes are left?
The answer is 42

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

Step-by-step reasoning process: First we need to know what half of Bills toys are, 60 toys / 2 = 30 toys. Hash has 9 toys + 30 toys = 39 toys. Together the boys have 60 toys + 39 toys = 99 toys.
The question and answer:
Question and answer:
Hash has nine more than half as many toys as Bill has. If Bill has 60 toys, how many total toys do the boys have?
The answer is 99