The expression n! is read n factorial and means n(n-1)(n-2)(n-3)(n-4)(n-5)...(3)(2)(1). Thus, 6! means 6x5x4x3x2x1, which equals 720,
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The expression n! is read \"n factorial\" and means n(n-1)(n-2)(n-3)(n-4)(n-5)...(3)(2)(1). Thus, 6! means 6x5x4x3x2x1, which equals 720, and 10! means 10x9x8x7x6x5x4x3x2x1, or 3,628,800. Notice that 6! ends with one digit of zero and that 10! ends with two digits of zero. How many digits of zero does 8,000! end with?
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