Question 604095
There are 10 single digit numbers (0,1,2,3,4,5,6,7,9,0)


There are 5 even single digit numbers (0,2,4,6,8)


There are 5 odd single digit numbers (1,3,5,7,9)



So there are 5*5*5 = 125 ways to construct the first part of the code and 5*5*5 = 125 ways to construct the second part.


In total, there are 125*125 = 15625 codes possible.