Problem: a man can do a piece of work in 6 days , but with the help of his son he can do it in 3 days . in what time can the son do it alone ?
Rationale: "explanation : in this type of question , where we have one person work and together work done . then we can easily get the other person work just by subtracting them . as son ' s one day work = ( 1 / 3 − 1 / 6 ) = ( 6 − 3 ) / 18 = 1 / 6 so son will do whole work in 6 days answer : b"
annotated_formula: divide(multiply(6, 3), subtract(6, 3))