instruction:
You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
question:
Ned had to wash 9 short sleeve shirts and 21 long sleeve shirts before school . If he had only washed 29 of them by the time school started , how many did he not wash ?
answer:
1

question:
At a company picnic 23 managers and 7 employees decided to start a game of volleyball . If they split into 6 teams how many people would be on each team ?
answer:
5

question:
In a bag there are 13 red marbles , 5 blue marbles , and 7 green marbles . What percent of the marbles are green ?
answer:
28