self Maths Puzzle

The sum of the reciprocals of the ages of two colleagues is five times the difference of the reciprocals of their ages. If the ratio of the products of their ages to the sum of their ages is 14.4 : 1, the age (in years) of one of the colleagues must be between (both inclusive)?

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self Other Question

A saint has a magic pot. He puts one gold ball of radius 1mm daily inside it for 10 days. If the weight of the first ball is 1 g and if the radius of a ball inside the pot doubles every day, how much gold has the saint made due to his magic pot?
In a green view apartment, the houses of a row are numbered consecutively from 1 to 49. Assuming that there is a value of 'x' such that the sum of the numbers of the houses preceding the house numbered 'x' is equal to the sum of the numbers of the houses following it. Then, what will be the value of 'x'?