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TIMO 2018 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 4 Question 14

TIMO · TIMO 2018 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 4

Question 14

Find the largest integer $n$ for which $\frac{2018!}{20^n}$ is a positive integer.
  1. 516
  2. 506
  3. 502
  4. 512