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MathNet 2006 — Part 02 Question 195

Math Olympiad Vault · MathNet 2006 — Part 02

Question 195

How many numbers between $10$ and $13000$, when read from left to right, are made up of consecutive digits in ascending order? For example, $456$ is one of these numbers, but $7890$ is not.


A) $10$

B) $13$

C) $18$

D) $22$

E) $25$