The task is to generate the correct answer for a given math problem.
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Question: Problem: how many integers k greater than 100 and less than 700 are there such that if the hundreds and the unit digits of k are reversed , the resulting integer is k + 99 ?

Answer: 50


Question: Problem: a can do a piece of work in 22 days and b alone can do it in 10 days . b works at it for 5 days and then leaves . a alone can finish the remaining work in

Answer: 11 days


Question: Problem: a man gains 40 % by selling an article for a certain price . if he sells it at double the price , the percentage of profit will be .

Answer:
180 %