The task is to generate the correct answer for a given math problem.

Q: Problem: a , b and c start a business each investing 20,000 . after 6 months a withdrew 5000 , b withdrew 4000 and c invests 6000 more . at the end of the year , a total profit of 67,600 was recorded . find the share of b .

A: 21,600
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Q: Problem: what is the units digit of 17 ^ 83 13 ^ 82 11 ^ 67 ?

A: 4
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Q: Problem: some people are standing square . from them 32 are removed and then form a small square and then 8 more removed . now we can not form the square . so how many people are there at the beginning ?

A:
ca n ' t be determine
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