TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: if x , y , and z are positive integers , and 3 x = 5 y = 6 z , then the least possible value of x + y + z is

SOLUTION: 21

PROBLEM: Problem: at a certain fruit stand , the price of each apple is 40 cents and the price of each orange is 60 cents . mary selects a total of 30 apples and oranges from the fruit stand , and the average ( arithmetic mean ) price of the 30 pieces of fruit is 56 cents . how many oranges must mary put back so that the average price of the pieces of fruit that she keeps is 52 cents ?

SOLUTION: 1

PROBLEM: Problem: a number is increased by 20 % and then decreased by 20 % . find the net increase or decrease per cent .

SOLUTION:
4