olymmath

OPM 2001 Problem 3

  • Final day 1

How many consecutive zeros are there at the end of the number 2001!=2001×2000×...×3×2×12001! = 2001 \times 2000 \times ... \times 3 \times 2 \times 1 ?

Dataset text AI-MO AoPS. Quoted with source.

Official text: Portuguese Mathematical Olympiad 2001 official paper, page 1.

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