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

[EX Q]: Problem: a clock shows the time as 10 a . m . if the minute hand gains 5 minutes every hour , how many minutes will the clock gain by 6 p . m . ?
[EX A]: 40 minute

[EX Q]: Problem: the average of first 22 natural numbers is ?
[EX A]: 11.5

[EX Q]: Problem: robert ' s salary was decreased by 70 % and subsequently increased by 70 % . how much percentage does he lose ?
[EX A]:
49