The combination locks at a school have the numbers from 0 to 39 (inclusive). A locker combination consists of three different numbers, where the order matters. Because of the way the locks are manufactures, all three numbers are even or all three numbers are odd. How many combinations are possible?
Why is it that you call yourself 'thanks for the help' but you have never thanked anyone for the help?
Also, although you have only posted 4 question posts you have asked many more questions than that.
Please confine yourself to one question per post. (like you have here)