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

[EX Q]: Problem: two trains of length 100 meters and 200 meters are 450 meters apart . they are moving towards each other on parallel tracks , at speeds of 90 km / h and 72 km / h . after how many seconds will the trains meet ?
[EX A]: 10

[EX Q]: Problem: danny and steve are running towards each other , each one from his own house . danny can reach steve ' s house in 25 minutes of running , which is half the time it takes steve to reach danny ' s house . if the two started to run at the same time , how much time longer will it take steve to reach the halfway point between their houses than danny to reach the halfway point between their houses ?
[EX A]: 12.5 minutes .

[EX Q]: Problem: the smallest number which when diminished by 2 , is divisible by 12 , 16 , 18 , 21 and 28 is
[EX A]:
1010