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

Q: Problem: the average of first six prime numbers greater than 20 is ?

A: 3
****
Q: Problem: 5 years ago , paula was 3 times as old as karl . in 6 years , paula will be twice as old as karl . what is the sum of their ages now ?

A: 54
****
Q: Problem: a certain number of men can finish a piece of work in 100 days . if there were 10 men less , it would take 10 days more for the work to be finished . how many men were there originally ?

A:
110
****