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

[Q]: Problem: sandy gets 3 marks for each correct sum and loses 2 marks for each incorrect sum . sandy attempts 30 sums and obtains 50 marks . how many sums did sandy get correct ?
[A]: 22


[Q]: Problem: find the least number must be subtracted from 105829 so that remaining no . is divisible by 21 ?
[A]: 10


[Q]: Problem: the pinedale bus line travels at an average speed of 60 km / h , and has stops every 5 minutes along its route . yahya wants to go from his house to the pinedale mall , which is 8 stops away . how far away , in kilometers , is pinedale mall away from yahya ' s house ?
[A]:
40 km