Step-by-step reasoning process: A single seed costs $.005 because .5 / 100 = .005. It costs $.02 cents to grow an ear of corn because .005 x 4 = .02. On each ear of corn he makes $.098 profit because .1 - .02 = .08. He sold 500 ears because 40 / .08 = 500.
[Q & A] The question is A farmer is growing corn. For every 4 seeds he plants, he gets one ear of corn, that he can sell for $.1. It costs $.5 for a bag with 100 seeds. If he makes $40 in profit, how many ears did he sell?
The answer is 500

Step-by-step reasoning process: He rented the helicopter for 2 * 3 = 6 hours. So he paid 6 * 75 = $450.
[Q & A] The question is Tom rents a helicopter for 2 hours a day for 3 days. It cost $75 an hour to rent. How much did he pay?
The answer is 450

Step-by-step reasoning process: Three dozens of macarons are equal to 3 x 12 = 36 pieces of macarons. So Emma has a total of 36 + 10 = 46 pieces of macarons for the party. Therefore, 46 - 15 = 31 pieces of macarons were eaten.
[Q & A] The question is Emma bought 3 dozens of macarons in addition to her 10 pieces of macarons for a party. If 15 pieces of macarons are left over, how many pieces of macarons were eaten?
The answer is 31

Step-by-step reasoning process: The cakes cost 3 * 12 = $36. So he paid 36 / 2 = $18.
[Q & A]
The question is John Smith buys 3 cakes for $12 each and splits the cost with his brother. How much did he pay?
The answer is 18