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

[Q]: Problem: a certain bacteria colony doubles in size every day for 25 days , at which point it reaches the limit of its habitat and can no longer grow . if two bacteria colonies start growing simultaneously , how many days will it take them to reach the habitat ’ s limit ?
[A]: 2


[Q]: Problem: what is the greatest prime factor of 2 ^ 10 - 1 ?
[A]: 3


[Q]: Problem: find the compound interest on $ 10000 in 2 years at 4 % per annum , the interest being compounded half - yearly ?
[A]:
$ 824.32