M4maths Maths Puzzle Category

A five digit number has all non-zero different digits & decreasing arranged. Average of all the digits of the numbers is 5. The difference of number and the number formed by reversing the order of digits is 84942. Sum of all such possible digits are

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A man invests some money in a business and get 10% returns in a year. Next year he invests total output in other business & gets 20% returns in the next year. In third year when he invests output after two year then he gets 30% loss in that year overall he receives the popilation of a town increased from 1,75,000 to 2,62,500 in a decade. the average percent increase of population per year ??