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

[Q]: Problem: given that p is a positive even integer with a positive units digit , if the units digit of p ^ 3 minus the units digit of p ^ 2 is equal to 0 , what is the units digit of p + 4 ?
[A]: 10


[Q]: Problem: in a certain country 1 / 5 of 8 = 4 . assuming the same proportion , what would be the value of 1 / 4 of 16 ?
[A]: 10


[Q]: Problem: a is twice as good a work man as b and together they finish a piece of work in 36 days . the number of days taken by b alone to finish the work is :
[A]:
108 days .