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: if the sides of a cube are in the ratio 5 : 3 . what is the ratio of their diagonals ?

Answer: 5 : 3'


Question: Problem: a and b invests rs . 2000 and rs . 4000 respectively in a business . if a doubles his capital after 6 months . in what ratio should a and b divide that year ' s profit ?

Answer:
3 : 4