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

[Q]: Problem: the average age of 10 men is increased by years when two of them whose ages are 21 years and 23 years are replaced by two new men . the average age of the two new men is
[A]: 3


[Q]: Problem: the least number which should be added to 1789 so that the sum is exactly divisible by 5 , 6 , 4 and 3 is ?
[A]: 11


[Q]: Problem: in what time will a train 200 m long cross an electric pole , it its speed be 144 km / hr ?
[A]:
5 se