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

[Q]: Problem: what least number must be subtracted from 13294 so that the remainder is exactly divisible by 97 ?
[A]: 5


[Q]: Problem: how many liters of a 40 % iodine solution need to be mixed with 35 liters of a 20 % iodine solution to create a 32 % iodine solution ?
[A]: 102


[Q]: Problem: there are 15 balls in a jar . you take out 3 blue balls without putting them back inside , and now the probability of pulling out a blue ball is 1 / 3 . how many blue balls were there in the beginning ?
[A]:
7 .