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

Problem: 2,7 , 17,3 , 11,19 , 5,13 , __
23

Problem: a jogger running at 9 km / hr along side a railway track is 250 m ahead of the engine of a 120 m long train running at 45 km / hr in the same direction . in how much time will the train pass the jogger ?
37 sec

Problem: a train running at the speed of 100 km / hr crosses a pole in 9 sec . what is the length of the train ?

250 m