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F-Zero X - 1998 VG is rated/received certificates of: Argentina:E USA:E
Factorials are used in combinatorial mathematics, which is a fancy term for a branch of mathematics that's used to answer questions like "how many different ways are there to arrange N items?" (Answer: N!) It turns out that using the formulas developed by combinatorial mathematics, the term 0! occasionally turns up, and in order to obtain the correct answer it's necessary to replace 0! with 1. Most obviously, there's no other way to arrange a "set" of zero items than to have ... um ... zero items, so the number of ways zero items can be arranged is 1, therefore 0! = 1.
The number ends in zero.
Their total is zero.
Sure. If some of the items on the list are positive and some are negative, then their average can be positive, negative, or zero. But if all of them are positive, then their average must be more than zero. Remember that the average is always greater than the least item on the list, and less than the greatest one.