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AMC8 2027 - Self-practice Set 10 Question 22

AMC8 · AMC8 2027 - Self-practice Set 10

Question 22

How many integers between $2020$ and $2400$ have four distinct digits arranged in increasing order? (For example, $2357$ is one such integer.)
  1. $9$
  2. $10$
  3. $15$
  4. $21$
  5. $28$