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

[EX Q]: Problem: a dishonest dealer professes to sell goods at the cost price but uses a weight of 800 grams per kg , what is his percent ?
[EX A]: 25 %

[EX Q]: Problem: a train 150 m long is running at a speed of 68 kmph . how long does it take to pass a man who is running at 8 kmph in the same direction as the train ?
[EX A]: 9 sec

[EX Q]: Problem: the smallest number which when diminished by 5 , is divisible by 12 , 16 , 18 , 21 and 28 is
[EX A]:
1013