The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: tim came second in math . when his mother asked him how much he had scored , he answered that he got the sum of the first 12 even numbers . his mother immediately worked out the answer . how much had he scored in math ?
[EX A]: 156

[EX Q]: Problem: paul ' s income is 40 % less than rex ' s income , quentin ' s income is 20 % less than paul ' s income , and sam ' s income is 40 % less than paul ' s income . if rex gave 60 % of his income to sam and 40 % of his income to quentin , quentin ' s new income would be what fraction of sam ' s new income ?
[EX A]: 11 / 12

[EX Q]: Problem: the area of a circle is increased by 800 % . by what percent has the radius of the circle increased ?
[EX A]:
200