TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: the sum of two consecutive numbers is 37 . what are they ?

SOLUTION: 18 and 19

PROBLEM: Problem: if each participant of a chess tournament plays exactly one game with each of the remaining participants , then 153 games will be played during the tournament . find the number of participants .

SOLUTION: 18

PROBLEM: Problem: two pipes can fill a tank in 12 minutes and 20 minutes respectively . both pipes are opened together and after some time the first pipe is closed and the tank is full in totally 10 minutes . for how many minutes was first pipe open ?

SOLUTION:
6 minutes