TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: excluding stoppages , the average speed of a bus is 60 km / hr and including stoppages , the average speed of the bus is 15 km / hr . for how many minutes does the bus stop per hour ?

SOLUTION: 4

PROBLEM: Problem: if the sides of a triangle are 26 cm , 24 cm and 15 cm , what is its area ?

SOLUTION: 180

PROBLEM: Problem: little john had $ 7.10 . he spent $ 1.05 on sweets and gave to his two friends $ 1.00 each . how much money was left ?

SOLUTION:
$ 4.0