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

Problem: students at a school were on average 180 cm tall . the average female height was 170 cm , and the average male height was 184 cms . what was the ratio a of men to women ?
5 : 2

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

Problem: eight machines , each working at the same constant rate , together can complete a certain job in 20 days . how many additional machines , each working at the same constant rate , will be needed to complete the job in 16 days ?