The task is to generate the correct answer for a given math problem.
--------
Question: Problem: the average weight of a group of boys is 30 kg . after a boy of weight 45 kg joins the group , the average weight of the group goes up by 1 kg . find the number of boys in the group originally ?

Answer: 14


Question: Problem: the radius of the wheel of a bus is 100 cms and the speed of the bus is 66 km / h , then the r . p . m . ( revolutions per minutes ) of the wheel is

Answer: 175


Question: Problem: if - 2 and - 3 are negative integers , then - 2 * - 3 + 2 is

Answer:
8