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

[EX Q]: Problem: what is the sum of the multiples of 4 between 63 and 151 inclusive ?
[EX A]: 233

[EX Q]: Problem: excluding stoppages , the average speed of a bus is 60 km / hr and including stoppages , the average speed of the bus is 40 km / hr . for how many minutes does the bus stop per hour ?
[EX A]: 20 min

[EX Q]: Problem: in 7 given numbers , the average of first 4 numbers is 4 and that of last 4 numbers is also 4 . if the average of these 7 numbers is 3 , the fourth number is ?
[EX A]:
11