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

[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: the number of singles that a baseball player hit increased 10 percent from her first season to her second season , and the number of doubles that she hit in the same time period decreased by 1 percent . if the total number of singles and doubles that she hit increased 3 percent from her first season to her second season , what is the ratio of the number of singles she hit in her first season to the number of doubles she hit in her first season ?
[A]: 4 : 7

[Q]: Problem: how many unique positive odd integers less than 90 are equal to the product of a positive multiple of 5 and an odd number ?
[A]:
9