Question #1 Variables in math don't have a specific value and can be anything, but the variables in this class have specific values and always mean something. Question #2 The two scopes are for all sprites and for this sprite only. Question #3 A variable can only have one value at a time. Question #4 It won't work because after the first one changes, the other one will "change" but it will change, but it will change to itself, so it truely doesn't really ever change. Question #5 The temp variable is temperarely holding one of the values, so value 1 and value 2 can switch.