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

Problem: how many positive integers less than 20 can be expressed as the sum of a positive multiple of 2 and a positive multiple of 3 ?
14

Problem: one fast typist type some matter in 4 hrs and another slow typist type the same matter in 6 hrs . if both do combine in how much time they will take to finish .
2 hr 24 mins

Problem: a man is 12 years older than his brother . in two years , his age will be twice the age of his brother . the present age of his brother is :

10