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

[EX Q]: Problem: john invests $ x at the semi - annual constant compounded rate of 2 percent and also does $ 20,000 at the quarterly constant compounded rate of 4 percent . if the interests are the same after 1 year , what is the value of x ? ?
[EX A]: 40,402

[EX Q]: Problem: a train running at the speed of 70 km / hr crosses a pole in 9 sec . what is the length of the train ?
[EX A]: 175 m

[EX Q]: Problem: a 5 - digit number is formed by the digits 2 , 45 , 68 ( each digit used exactly once ) . what is the probability that the number formed is divisible by 4 ?
[EX A]:
2 / 5