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

Problem: a and b together can complete work in 6 days . a alone starts working and leaves it after working for 4 days completing only half of the work . in how many days it can be completed if the remaining job is undertaken by b ?
12

Problem: what is the sum of the numbers between 1 and 14 , inclusive ?
105

Problem: a towel , when bleached , lost 30 % of its length and 25 % of its breadth . what is the percentage decrease in area ?
47.5