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

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

Problem: a train 200 m long can cross an electric pole in 5 sec and then find the speed of the train ?
144

Problem: a certain list consists of 21 different numbers . if n is in the list and n is 5 times the average ( arithmetic mean ) of the other 20 numbers in the list , then n is what fraction of the sum of the 21 numbers in the list ?

1 / 5